Just update my rig too, C2D E4300 OC 3.0G $116 Stock Heatsink and fan
2X1G Corsair XMS2 6400C4 $110
MoBo: Gigabyte DS3 P965 $100
Video : 7600GT $110 (a bit slow, I know, :)
PSU: Ultra Xfinity 600W: free after Rebate: Pay $12 for shipping
Case: Free after rebate
HD: From old rig, no extra fee
So the total is $448. Not sure how much in GBP.