Drivers are barely debatable at this time. Red team has brought their A-Game for the drivers for the past year now, they've been pretty much flawless for single-card setups (you know, where it counts
.) Their GPUs have been some of the best, and right now there's virtually no difference between Red and Green, aside from PhysX and price. And to be fair, when Nvidia screws up their drivers, they tend to destroy the cards instead of just give annoying little bugs, hehe.
Regarding AA, though, AMD's AA is only blurry when you use MLAA since that's really the effect that that type of AA does. When forcing MSAA, AMSAA or SSAA via CCC or just enabling it within games, there's no difference between the two brands. Though, for some reason, AMD deems it necessary to essentially disable AA for certain games (SC2 comes to mind.. but I can understand why they say that, as framerate can make a huge difference when playing competitively), it's nigh unnecessary at higher resolutions.
All in all, though, as stated, it's user preference. I'm keeping a close eye on Keplar and Southern Islands, hopefully it'll be like it was this round with plenty of awesome cards to choose from.