Check out my build guide in my siggy.
Motherboard: Your not OCing so there is no point getting the Asus P8P67, the Asrock Extreme4 P67 would save you bout 30$. Plus it's basically the same board. The Asrock can OC just as well, your not using that though so it doesn't matter.
CPU: Drop down to the i5 2500. The 2500 still beats out the i7 950 and is cheaper by quite a bit. Plus you really don't need multi-thread since your only playing games. The 2500 is enough and will save you about 100$.
RAM: Corsair... is kind of not a good bang for the buck. Gskill is a good deal, This kit is 70$ after Promo plus it is good enough since it's 8gb. It'll last you awhile.http://www.newegg.com/Product/Product.aspx?Item=N82E16820231426&cm_re=G_skill_8gb-_-20-231-426-_-Product
Get the Asus DirectCu 6870, great cooling 220$ cheaper too! Plus its 200$ AR. Might as well get the better cooling route. quieter than stock cooling to.