I also use a GTX 680 but i play at 6040x1200 res, and have no issues... Love my card. If iwas to buy a card now i would probably get the GTX 680 again. You will get a lot of people pushing you to get the 7970 also. If price isn't an issue and you don't run at high resolution with high AA I would say get the 680. If you play at high resolution and high AA a 7970 will give you better FPS. But from recent articles it seems that nvidia cards(due to drivers) are smoother at lower fps. So say a gtx 680 could get away with 30-40 fps as playable where the 7970 might need 40-50 fps (Those are totally made up numbers to get you an example).