Hey look, I don't even have to say it.
Seriously, if all your games are working great, I wouldn't mess with the driver version you are using. If you are getting crashes in AH or other games, or you have some other display problems, then I would recommend the latest WHQL certified drivers (30.82). Performance gains from drivers at this stage of the game are very minimal, despite nVidia's constant claims of huge improvements. If you get decent framerates now and everything is working smoothly, I wouldn't recommend you change driver versions.
