Before leaving me such a pile of money on the plate, case and power supply, I would spend it on other components :ugly:
You put a couple of GT on top, taking out air and served. 1850 if you're going to regulate them, 1150 without regulation.
You can scratch it on SSD getting the 120 one or on graphics with a 770 4GB (although I'll stick with a 780 from lost to the river), also improving disipation, the S12II seems like enough power supply to me. What I want to tell you is that the money should be on the graphics, scratch it on components that don't have an impact on performance, I wouldn't get anything above the Z77-D3H, unless you're looking for SLI, which even then I wouldn't get anything above the Extreme4. If you have extra money and you put a GPU well, like if you get a card for 200€.
By the way, the 8970 is coming out soon, if you're not in a hurry it would be good to wait. It's only a couple of months, there's not a graphic generation jump every day...
PD: If you build it yourself I would ask for a cooler on pccomponentes, the HR-02 or an Archon are very good and cost little more than the EVO.