My current system is:
GPU: AMD 6990
CPU: 2500k @ 4.8
RAM: 16GB
PSU: Enermax galaxy 1250 watt
MOBO: MSI P67A GD65
Cooling: Liquid
And i am even thinking of upgrading
(Mainly because i want to be able to max EVERYTHING, not just most of the stuff) also i run at 120hz (Not in 3d) so i need an average of 120 fps :P
Yes i know i am insane, people tell me that a lot.