one word, crysis.
When bioshock came out, I dumped 1700 bucks into a new computer that i said I would when a next gen game came out that I wanted (I was surviving with a 2800xp with a 7800gs AGP). My new comp is a quad core 6600 with an evga 8800 ultra.

Ive packed it into a bad ass antec p180b case and its quieter then my old computer. ^^