I've never had issues with ATI cards or drivers. Considering all the problems I've had with nvidia's drivers I'm willing to risk having issues with ATI drivers since I don't have a lot to lose. I know it's rumored but when XMAN52373 says 10% now I truly am concerned since he is typically very pro nvidia
I'm going to wait and see who has the best price/performance and whoever comes on top will likely get my buy. I think ATI may be in the best position to deliver that. A 10% difference in performance is no biggie to me. Either card will improve my performance by quite a lot. But the price difference between the two is definitely going to be the deciding factor.