Just my opinion, but here's what I'd get:
MSI GeForce GTX 580 Twin FrozR II 1536MB GDDR5 PCI-Express Graphics Card £409.99
Asus VG236HE 23" TRUE 120Hz 3D Widescreen LCD Monitor - Black £285.95
Intel Core i7-2600K 3.40GHz (Sandybridge) Socket LGA1155 Processor - OEM £236.99
Asus P8P67 PRO Intel P67 (Socket 1155) DDR3 Motherboard - (Sandybridge) £151.99
OCZ Vertex 2E Bigfoot 90GB 3.5" SATA-II Solid State Hard Drive £149.99
Nvidia GeForce 3D Vision Kit £119.99
Cooler Master Silent Pro Modular 850W Power Supply £107.22
G.Skill RipJawsX 8GB (2x4GB) DDR3 PC3-12800C9 1600MHz Dual Channel Kit (F3-12800CL9D-8GBXL ) £99.98
Microsoft Windows 7 Home Premium 64-Bit - OEM (GFC-00599) £81.98
Fractal Design Define R3 Midi Tower Case - Black Pearl £81.70
Sennheiser PC 330 Gaming Headset £71.99
BeQuiet Dark Rock Pro CPU Cooler (Socket LGA 775 / 1155 / 1156 / 1366, AM2 / AM2+ / AM3 / 754 / 939 / 940) £54.98
Samsung SH-B123L/BSBP 12x BluRay ROM DVDRW DL & RAM Lightscribe SATAII Optical Drive - Retail Black £50.99
Samsung SpinPoint F3 1TB SATA-II 32MB Cache - OEM (HD103SJ) £41.99
Razer Arctosa Keyboard - Silver £39.80
Razer DeathAdder Respawn 3500dpi Xtreme Precision Gaming Mouse and FREE Boogie Bug AimB.Pad XL Gaming Mouse Surface £44.06
Sub Total : £1,691.33
Shipping : £25.45
VAT is being charged at 20.00% VAT : £343.36
Total : £2,060.14
If you want a smaller cooler, you could get the H50 and install a quieter fan.
Sorry, but I'm not a fan of Antec cases. IMO they look cheap and don't provide decent cable management.
I was looking for a PC of this spec as well (minus the monitor and 3D kit), but since seeing the new Fortress case from Silverstone, I'm thinking of building something small, but powerful instead.
http://www.silverstonetek.com/products/p_spec.php?pno=FT03&area=usa