So I don't want to spend more than £450 as I'm not rich :P
I have bought 4 new parts for my computer
Intel Core i5 3570K 3.4GHz Socket 1155 6MB Cache Retail Boxed Processor
Asus P8Z77-V LX Socket 1155 VGA DVI HDMI 8 Channel Audio ATX Motherboard
EVGA GTX 660 SuperClocked 2GB GDDR5 Dual DVI...