For gaming, the i7 is a waste. The only difference between it and an i5-3570k is that the i7 has hyperthreading... which games either don't use or can actually get slowed down by anyways, which means when you're gaming you'll want it off, which means you're paying $100 more for the same damn thing.
Other than that, Shoryuken's rig is very nice, though I'd get windows 7 for compatibility issues, and a SeaSonic g 550w to save money, since it doesn't need 620w.
EDIT: And I disagree with the Asus being 'better' than the AsRock. Just throwing that out there.