Custom built PC:

CPU: 64-bit AMD AThlon AM2 4600+ Dual Core (2.4ghz)
Mobo: MSI , NForce 570, SLi, ATX and all that jazz
RAM: 2x512mb Corsair DDR2
Graphics: 640mb ASUS nVidia EN8800GTS
Monitor: 19" Hyundai TFT Widescreen
HDD: 2x Seagate Barracuda 160gb
Accessories: 5.1 Surround Sound Creative P5800, Logitech G15 Gaming Keyboard, Logitech MX610 wireless Laser mouse

I'm a-thinking of building a new one... but I haven't got the money, and this one still works. I'd like to build a higher spec one before Uni, though.