I would recommned dropping to a i5 2500k (SAME in-game performance, same overclockability) and dropping that 100 bucks saved into a current generation video card. I see that you alocated $250 for a card. This move will allow you to spend $350 - that buys (in about a week) a 7870 AMD card. Approx a 30-40% imporvement in BOTH perfomance and lower power/noise over the 480 that you are looking at.
If you "Nsist on Nvidia" just give it a month, and the new "kepler" cards are sure to blow you away.
And, you cant have an intel processor with an AMD motherboard ^.-