XFX ATI Radeon 6950 2048MB GDDR5 PCI-Express Graphics Card £199.99
(£166.66)
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor £179.99
(£149.99)
Gigabyte P67A-UD3-B3 Intel P67 Chipset (Socket 1155) DDR3 Motherboard - (Sandybridge) ** B3 REVISION **
£104.98
(£87.48)
Corsair TX 650W ATX SLi Compliant Power Supply (CMPSU-650TXUK) £69.98
(£58.32)
Antec 300 Three Hundred Ultimate Gaming Case - Black
£46.98
(£39.15)
Razer DeathAdder Respawn 3500dpi Xtreme Precision Gaming Mouse - Retail £44.99
(£37.49)
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ)
£42.98
(£35.82)
OCZ Platinum 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz Ultra Low Voltage Dual Channel Kit (OCZ3P1600C9ELV4GK)
£36.98
(£30.82)
Steelseries QcK+ Gaming Mouse Pad (63003)
£11.98
(£9.98)
Sub Total : £615.71
Shipping cost assumes delivery to UK Mainland with:
DPD Next Day Parcel
(This can be changed during checkout) Shipping : £12.50
VAT is being charged at 20.00% VAT : £125.64
Total : £753.85
Like Stulids but with some of the parts that were in your original post.
Depending on what resolution you will be playing at / your monitor, you could possibly save a bit by getting a little bit of a cheaper graphics card, although money probably should be saved elsewhere.
EDIT: Quite a bit late, I know >_>.