I need to get an inexpensive (sub-$200) GPU for my 4,1. It needs to be able to push a SST 4K monitor at 60Hz and a 1080p monitor at 60Hz as well. Most intensive load would be rendering 4K in FCPX. I'm currently eyeing the GeForce 750 ti (possibly the superclocked from EVGA) and 950 but before I push the button I want to know if there are any others I should consider. I don't have much money, and am still kinda a newbie at video cards, so help would be greatly appreciated. Thank you!