Just for my ease I will stick to NVidia cards. I realize cost per value is not as a big issue in this specific case but it still exists. I would think a titan so I can eventually sli? Also seems to me I have to take the most powerful if I want 4k at 30fps and demands will only increase this year. I'm thinking a 7xx will be cheaper but less powerful, and I'm at the rare spot where I don't get to weigh cost/performance and just need power? I don't know seems like I should wait for 7xx reviews because I think I will have fun at 1440p on 50 inches for a month or so.