Anyone who says AMD (ATI) graphics cards aren't good for gaming are blowing a very uneducated opinion out of their ass, same for those who say that about NVIDIA. NVIDIA and AMD are never going to be better than each other performance wise, because they're always going to release a model that one-ups the other's previous one that one-up'ed the one before that. It's a never ending cycle, and I wouldn't have it any other way. :p
AMD cards always come at a good price point, whereas NVIDIA tends to be more expensive, but it all depends on the maker of the graphics card when it comes to that (Sapphire, EVGA, Zotac, etc.). As for drivers, NVIDIA's do tend to be easier to find, as has been said before, but AMD's are just as good.
Between EyeFinity and PhysX and stuff like that, I wish every graphics card had all of those features, it's a shitty feeling to have to choose.

kay: