Looks like the 660 may be worth it when you're looking at resolutions up to 1920 x 1080 (or 1920) but it seems that it doesn't pack enough punch if you game at 2560 x 1660 which some people (such as myself) have migrated to while increasing monitor size. If I were to get a card in the mid range pricing, I'd definitely get an AMD card, but I'd probably throw the 660 into my fiancee's rig (as she's down at 1080p).