I bought this because the next i7 is fantastically expensive. My setup is an Asus P6T SE mainboard, 6GB Patriot Viper RAM, Western Digital Caviar black 1TB hard drive, ATI Radeon 4850 graphics card with this CPU and windows 7. So far I've only played GTA4 and Trackmania nations but both play very smoothly and look beautiful. Judging by all the reviews I looked at this CPU is definitely the way forward at the moment.
By the way, I build my own system and it was very easy. This CPU is a piece of cake to install and, as long as you buy the retail boxed version, rather than the oem version it comes with a perfectly adequate cooler, with thermal pad already attached so you don't need thermal paste. Note, however, that I don't overclock, if you intend to its probably worth buying a more industrial cooler.