Case - Corsair 700D - £148
PSU - HX850 - £127
Motherboard - Abit P35 - £65
CPU - Q6600 - £166
RAM - OCZ 4GB (4x1GB) - £48
GPU - GTX275 - £165
HDD - F1 1TB - £72
SSD - Intel 80GB X25-M x2 - £330
BluRay drive - £70
Total: £1191
And I'm building up about a £400 shopping list now for a load of watercooling gear, so make that about £1600 .
I actually am shocked, cos that doesn't even include my keyboard, mouse, desk, mousemat or monitor, which all add up to £490. So we're talking well over 2G once you include all the essential extras.