If its a FPS and it don't come to the PC it ain't a real man's game! I have both a gaming PC and an Xbox for clarification... and my Xbox does get used; I just threw 15 TDs and for 1,024 yards in Madden 2011 in 7 min. quarters on AllPro... doh.
Although I really wish Reach would come to the PC; no reason it shouldn't or can't (except MS being boobs).... because mouse/keyboard FTW.