firepro w7000

Hello guys, i'm not new in hackintosh world, but my problem for the next build is the GPU. I'm working on a "cheap" professional videoediting workstation: i7 4930k GA x79 UP4 Corsair Vengeance Pro 16gb Samsung 840 EVO 240GB Corsair h100i Corsair RM850 GPU: ? I'm looking for the best GPU out...