I had a GTX 960 2GB card in my cMP (4,1->5,1), but moved it to a different "souped up" cMP that I setup for a relative that wanted a cMP for work. So, now I'm rocking a Apple 5570 1GB in the mean time , and having just acquired a couple Dell P2715q 4K displays, I'm wondering what to put in my system now. I don't game, and I don't anticipate doing any professional video editing. Just general apps, Adobe CC, etc. I need something to drive the dual 4K displays (via DP). I think I need 4GB cards, but I can't decide between nVidia and AMD. I think the 960 isn't powerful enough (or is it?) so looking at a 4GB GTX 970. On the AMD side, looking at a 4GB R9 280X (or can I get by with a 4GB R9 270X?). nVidia = low power but no boot screens and always chasing web driver updates. AMD = if I get a flashed card (more $$$), I have boot screens, but cards use much more power and run hotter. I want to keep the cost low, but I want the best bang for the buck to drive these two displays. What would you suggest? Thanks.