ok so my budget is £900 and i have put together a build, any suggestions are welcome 
MSI ATI Radeon HD 6950 2048MB GDDR5 PCI-Express Graphics Card £209.99
(£174.99) £209.99
(£174.99)
Coolermaster HAF X with Coolermaster GX 750W PSU £164.99
(£137.49) £164.99
(£137.49)
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor with FREE Operation Flashpoint Red River Game £161.99
(£134.99) £161.99
(£134.99)
MSI P67A-GD65 Intel P67 (socket 1155) DDR3 Motherboard - (Sandybridge) ** B3 REVISION ** £132.00
(£110.00) £132.00
(£110.00)
G.Skill RipJawsX 8GB (2x4GB) DDR3 PC3-12800C8 1600MHz Dual Channel Kit (F3-12800CL8D-8GBXM) £89.99
(£74.99) £89.99
(£74.99)
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ) £44.99
(£37.49) £44.99
(£37.49)
Hitachi Deskstar 7K1000.C 1TB SATA-II 32MB Cache - OEM (0F10383) £41.99
(£34.99) £41.99
(£34.99)
Cooler Master V8 CPU Cooler (Socket 940/AM2/AM2+/AM3/LGA775/LGA1366) £39.98
(£33.32) £39.98
(£33.32)
Samsung SH-S223C/BEBE 22x DVD±RW SATA ReWriter (Black) - OEM £16.99
(£14.16) £16.99
(£14.16)
Sub Total : £752.42
Total : £902.90

MSI ATI Radeon HD 6950 2048MB GDDR5 PCI-Express Graphics Card £209.99
(£174.99) £209.99
(£174.99)
Coolermaster HAF X with Coolermaster GX 750W PSU £164.99
(£137.49) £164.99
(£137.49)
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor with FREE Operation Flashpoint Red River Game £161.99
(£134.99) £161.99
(£134.99)
MSI P67A-GD65 Intel P67 (socket 1155) DDR3 Motherboard - (Sandybridge) ** B3 REVISION ** £132.00
(£110.00) £132.00
(£110.00)
G.Skill RipJawsX 8GB (2x4GB) DDR3 PC3-12800C8 1600MHz Dual Channel Kit (F3-12800CL8D-8GBXM) £89.99
(£74.99) £89.99
(£74.99)
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ) £44.99
(£37.49) £44.99
(£37.49)
Hitachi Deskstar 7K1000.C 1TB SATA-II 32MB Cache - OEM (0F10383) £41.99
(£34.99) £41.99
(£34.99)
Cooler Master V8 CPU Cooler (Socket 940/AM2/AM2+/AM3/LGA775/LGA1366) £39.98
(£33.32) £39.98
(£33.32)
Samsung SH-S223C/BEBE 22x DVD±RW SATA ReWriter (Black) - OEM £16.99
(£14.16) £16.99
(£14.16)
Sub Total : £752.42
Total : £902.90