Ensure you always legally own the game on console before downloading and using emulation
I have been playing hell of a lot of 2k8, 2k10 and 2k11 the last couple of years via emulator so I'll give a basic run down in my view the good and bad points. My opinion is that Xenia is the best experience for 2k10 and Dolphin for 2k11 (obviously it was Wii only). If you're a 2k8 kinda person then RPCS3 is the winner, but I'll explain below. All three of these games are showing their age in many areas but still offer some fun over EA NHL, personally NHL 23 and NHL 24 are a step in direction.
My recommendation for emulation is get a
minimum of a 7th gen i7 and gtx1080 with 16gb ram, the more power you have the better it gets. I have a ryzen 5800x with rtx 4070ti and it all runs extremely well.
Things to note:
Sliders are a must to fix issues in gameplay that were never patched. The PS3 and XBOX 360 era of console were around before game patching online was part of normal gaming culture. I've found with 2k10 and 2k11 that the AI defenders often get stuck, don't turn or close down you down and this results in too many breakaway chances, 2k8 doesn't seem to have this problem. You're always going to get them in 2k games but keeping them low makes the experience so much better. My advice to fix this is ensure your speed burst effect is set much lower than the AI this forces you to play postions better, ensure that ice friction is higher than 40-50 as the AI doesn't seem to react very well to low ice friction which gives the human player a huge advantage turning and accelerating away. Having high checking, poke checking and stick lifting for the AI sliders allows them to steal the puck before you break away, don't forget to set high defensive aggression too.
Focus your sliders on the AI defensive traits you may want to consider setting deep defending strats in the team strategies area of each game too this makes defenders stick back in their zone more. DJ Neo and Venom have posted good slider sets as a basis on these forums for I foundthe AI doesn't hit, poke or stick lift anywhere near enough. 2k11 sliders aren't really available so use my notes above setting those, this game particularly suffers from the breakway bug and its so easy to hit in my view set your checking to 0. 2k11 is a mess in a lot of areas but I've managed with tweaks to get it to play reasonably better.
RPCS3 - Probably the most popular method for playing 2K games currently I see the most youtube videos for this method. There are a lot of modern rosters available too. 2k8 runs flawlessly now on a good spec PC you will probably need to turn on Write Colour Buffers to fix broken and missing graphics. 2k8 game does suffer from animation and cut scene speed up, this can be fixed for
some people changing Framerate settings or using V-Sync but gameplay is normal speed and smooth. 2k10 runs well enough to play but can be choppy when using broadcast camera as this forces the game to render more rink effects, there are no best settings its dependant on your PC. It upscales really well and looks very good on 1080p and 1440p and above. The only major issue is that the PS3 version of the game never got patched so if you have sliders on 59 skating speed or less you risk the game hanging on faceoffs which is a known bug. I would pick RPCS3 if playing 2k8 but try and play through Xenia for 2k10 which I'll explain below. As with all 2k games and as I have said above sliders are key!
Xenia - This emulator had a massive update about 4-5 months ago and now runs 2k10 better than RPCS3. The emulator doesn't upscale as well or have the graphical settings of RPCS3 yet but the framerate is near perfect on a good spec machine. I have upscaled it to max on Xenia and get a bit of black screen flicker on face offs but that doesn't bother me. As 2k10 was patched for Xbox the game overall is so much better as tweaks were made to the animations and the faceoff bug doesn't occur. You can install this patch through Xenia in less than 30 seconds. I would say installing Reshade is a good addition. I've only briefly tried 2k8 through Xenia but gave up as the game suffered lots of missing graphics and gameplay was sped up. Might need someone to really play with the config file to see what is achieveable.
Dolphin - Recently started dabbling in 2k11 and Dolphin again. My only real complaint with Dolphin is its fiddly and clunky to setup controllers. As the game was built for a Wii remote and nunchuck controller navigating the menus is a bit hit and miss and you'll press the wrong buttons until you get used to buttons being swapped around, you'll need to set Classic Controller in the emulator. 2k11 plays extremely well, that said there are some weaknesses in this game that you can only fix 80% with sliders. Hitting is way overpowered and the breakaway bug is rife. I've had to set the AI speed so much higher than human and set hitting down to zero. The thing about 2k11 though is it has a proper working skill stick, no animation lock the older games suffered from and it just feels more modern with its animations and shooting. The game does upscale very well but you're going to have to put up with a lot of low res Wii textures I've used the texture dumping and loading settings in Dolphin to make and import my own high res versions of each teams ice rinks.
Closing notes:
These are older games now they are missing things like disallowed goals, fast paced commentary and 3 on 3 overtime hockey or a 32 team league, that said 2k8 has an extremely deep franchise mode and worth checking out I can see why people suggest this game has the best goaltenders in an NHL game. 2k10 and 2k11 have really balanced and working penalty call systems the AI actually gets calls, which I found broken from NHL 12 up until about NHL 17.
One of my big big big pieces of advice for 2k8 is use Snowdrifts editor to make some edits at the start of your franchise mode. The game can be a bit low on penalty calls, as I've explained before in other treads, globally set all of your player aggresion 15-20 points higer than standard, and lower composure levels. I tweak mine so every player fits into the 30-60 range. This of course lowers all players overall rating so you'll need to edit at the start of each franchise year but with penalty call slider set to max you'll start to see the AI end up in the sin bin which is a big part of hockey.
2k10 and 2k11 have weaker franchise modes but strong on ice gameplay, so my view is let the AI dictate things like drafting and trading to make things harder. Slider settings and custom rosters have kept the games alive to a certain extent. I personally think the EA NHL series is overall a better product now but those games ARE missing something, every now and then something will happen in a 2k game that makes me very happy. Goalies in the EA NHL series have come a long way and only 2k8 gets near that, 2k10 and 2k11 do have weak goalies on a breakaway or shootout. 2k games can be slowed down and made into more of a simulation than EA games and I think that is the appeal, the AI feels a little bit fairer. If you're someone who gets 5-10 years into a franchise you'll love the 2k10 and 2k11 historical stats that track things for years.
If you're wishing to play multiplayer coop I've yet the try the netplay features in RPCS3 and Dolphin I use a combination of emulator and a programme called Parsec to connect in my friend to share my screen and desktop. When I've got time I'll post up my 7-8 minute period sliders for each game. If you're an NHL Legacy player keep an eye out onlin as I'm parting the modding community for this game and I'm releasing a new roster editor soon capable of much more than NHL view.