Have you thought about Sandy Bridge which is slightly quicker than the i7 1366 setups.
Done a quick build below:
Your basket
Product Name Qty Price Line Total
MSI ATI Radeon HD 6950 OC Twin FrozR III Power Edition 2048MB GDDR5 PCI-Express Graphics Card £199.99
(£166.66) £199.99
(£166.66)
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor - OEM £156.98
(£130.82) £156.98
(£130.82)
Asrock Z68 Extreme4 Intel Z68 (Socket 1155) DDR3 Motherboard £144.98
(£120.82) £144.98
(£120.82)
OCZ StealthXStream 2 700W Power Supply £54.98
(£45.82) £54.98
(£45.82)
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ) £43.99
(£36.66) £43.99
(£36.66)
Kingston HyperX Genesis Grey 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (KHX1600C9D3X2K2/4GX) £34.99
(£29.16) £34.99
(£29.16)
Corsair A50 High-Performance CPU Cooler (Socket AM2/AM3/LGA775/LGA1155/LGA1156/LGA1366) £28.99
(£24.16) £28.99
(£24.16)
OcUK 22x DVD±RW SATA ReWriter (Black) - OEM £14.99
(£12.49) £14.99
(£12.49)
Sub Total : £566.59
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £10.00
VAT is being charged at 20.00% VAT : £115.32
Total : £691.91
Edit: Comparison:
http://www.anandtech.com/bench/Product/100?vs=288