As long as they are the 260 core 216s. Even if a game doesn't support SLI overclocked a single 260 216 can rival a 280 at stock speeds, and you can dedicate the second card for physx. Personally I would get a 4870X2 or even a 4850X2 if I had that kind of money, but since you want to stick with nVidia stick with the 260 sp 216
Is ATI that much better? My preference is solely b/c I have often had driver problems with my current (but very old) video card ATI 9800 AGP. I would reconsider if it is significantly better for games.
driver stability is mixed these days. both manufacturers might have a buggy driver release or might be buggy on a certain pc config. for me personally, nvidias drivers are excellent but alot of people would say the same for ati. i'd go for the sli'd 260s though, even if the game doesnt support sli, you still have relatively good performance with one 260. one 260 core216 is equal to a hd4870
that is good to hear I am not alone. I've owned both cards (ATI/Nvidia) and I agree it is personal preference. But I have been out of the loop so long I didn't know if there really was an advantage one over the other for gaming at this point in time.