I just built a PC a month ago for a total $1100 from newegg, this is what I went with:
i5 2500k; pretty much the best cpu for gaming out right now, overclocks for performance ~ equal to the i7 2600k
GTX560ti MSi hawk factory OC; good deal, plays every game I own at 60fps including Just cause 2, Crysis, Dirt 3.
Asus p67 Sabertooth; got a good deal on this, it's pretty cool
G.skill ripjaws 8g 1600; 8 gigs is all you need, 1600ghz is all that is effective for most mobos
coolermaster case with usb3.0; normal hardrive (sata 6.0, 64mb cache); 750 wat psu; also win7 oem.