I can't decide between these cards. I was leaning toward 290x non-reference but the price is too high. Reference goes for $600, and I can't imagine how much it will cost for the non-reference. My local Fry's has GTX 780 FTW for $550 and I heard that overclocked 780 beats 290x. I will be doing most of my games on 1080p resolution. Which one do you think I should get?