So I'm building a new desktop and alli need is my gpu. I want to be on the higher end of things but I'm still trying to save some money. I can't really figure out if I should go with two 660s or a single 780. Or even a 770 4gb or a 280x. I want something that can handle next gen games around very high or even ultra resolutions. And of course crysis 3 on ultra would be nice too. Any suggestions?