markwp :
The performance difference is not that big between the 650 ti boost and the 660. That being said, the 3470 should not be a bottleneck problem, and if you don't plan to overclock in the future your build will be fine. It's tough to trade dollars to get the max for the money, just be sure you don't put yourself in a position of wanting to overclock and then having to buy both a new cpu and mobo.
You'll get very good gaming on your build as it stands.
Mark
thanks bro! how about this build what do think?
proc: Intel core i5 3470
mobo: Gigabyte H77M D3H
vga: EVGA GTX 660 FTW 2gb/192bit, signature 2
ram: G.Skill RipJaws X (dual) 2x4gb ddr3 1600 CL9
psu: Seasonic (M12II) 520watts 80Plus Bronze