Custom System:
CPU: Intel i7-2600K @ 3.4 GHz
MB: Gigabyte Z68XP-UD5
RAM: Corsair Dominator 8GB DDR3 @ 1333 MHz
GPU: EVGA NVidia GeForce GTX 570 2GB
HDD1: OCZ SSD 60GB
HDD2: 1TB
Sound: Creative SB XFi Xtreme Gamer
I guess it will be usable for several years from now..