I will (reluctantly) add that, over the (many) years, I've had better experience with nVidia cards and drivers.
I say this begrudgingly, because I despise their unscrupulous business practices, most recently with Batman Arkham Asylum antialiasing. I've had no trouble from their products, though, which is why I've stuck with them. I can't honestly say the same thing about ATI, which is why I always end up with nVidia under the hood. KotOR is a good example.
Here's my ultimate advice: if you want to buy a PC now, get it with the crappiest video you can get, and wait until March to make your final decision on what GPU you want. You can then use the crap video card for a backup.
"They should rename the team to the Washington Government Sucks. Put Obama on the helmet. Line the entire walls of the stadium with the actual text of the ACA.
Fix their home team score on the board to the debt clock, they can win every game 17,000,000,000,000 to 24. Losing team gets taxed by the IRS 100%, then droned."