Intel i5-3570K @ 4.7GHz | MSI Z77 Mpower | Noctua NH-D14 | Corsair Vengeance LP White 1.35V 8GB 1600MHz
Gigabyte GTX 670 OC Windforce 3X @ 1372/7604MHz | Corsair Force GT 120GB | Silverstone Fortress FT02 | Corsair VX450
Well I built something similar to a puppy build that Chaud posted about a year ago and it ran me about $400. But I reused my optical and hdd. So. . .I don't know it's definitely an option. And it runs Wow on ultra at about 100 fps and BF3 on mid settings pretty well.