All the cool people play on PC. So you know...
Truer words have never been spoken
But seriously, the PC community is fantastic.
Also, my $1300 rig that I spoiled myself with:
Case: Cooler Master HAF 932
Mobo: ASUS Crosshair IV Formula
CPU: AMD Phenom II 955 BE @ 3.2GHz (OC'd at one point, but it was causing some issues I haven't resolved yet)
GPU: XFX AMD Radeon HD6870
RAM: 8GB DDR3 1600 (you can get 4GB for like $50)
CPU Cooler: Thermaltake SpinQ VT
PSU: Antec Truepower New 750W
HDD1: WD Caviar Black 1TB SATAIII 6GB/s
HDD2: WD Caviar Black 1TB SATAII 3GB/s
And I'll tell you what, it's a pretty beastly machine.
Just saw your build, looks good! I'll tell you what, the HAF cases are amazing. Though, I suggest you take a look at the HAF 912. It's the same size as the 922 but comes with some cooler stuff.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119233&Tpk=HAF%20912