Thanks for the replies guys. I can get either for roughly the same price. And I've looked at benches and the ATI card does better on some games than others. I'm not loyal to nvidia, but been using them since my 7600GT and prefer their software.
It's just I see alot of YouTube vids lately of games and it seems more and more people are using ATI. That's why I can't decide lol.
To be honest it matters so little, you should just stick with what you're comfortable with/feel good about. One card will be better in one game, one in another.
If you say "I've always had Nvidia and was happy with it and had next to no problems" I would just stick with that, because you're not going to make a mistake with buying either card.
Or alternatively what I pay a lot of attention to is the quality of the cooler and the noise (you'll find that kind of information in any review).