sorry about the copy n paste, but i couldn't be arsed to write it all out!
this little lot is about the best you can get for the money. you could get a cheaper graphics card and another harddrive or a cheaper case. but this will give you an idea anyway.
Logitech G5 Laser Gaming Mouse, 2000dpi, USB 1.1/2.0, 7 Buttons, Black - Gamers Choice £29.79 £34.26
LN20543
Logitech G15 New Rev.2 Gaming Keyboard, USB, Wired, Silver/Black, GamePanel LCD, Illuminated £54.95 £63.19
LN20669
1500W Xigmatek NRP-HC1501 80%+, Modular, Output Protection, ATX 12V V2.2, EPS V2.92, QUAD SLI PSU £149.00 £171.35
LN23525
27" Dell 2709W UltraSharp Widescreen LCD 1920x1200 , 3000:1, 6ms, DVI, Adjustable Height/Tilt/Swivel £422.99 £486.44
LN24684
Silverstone TJ10B-WNV NVIDIA Edition, Black, Full Tower Case w/o PSU £189.99 £218.49
LN26184
1TB (1000 GB) Samsung HE103UJ Spinpoint F1 RAID Class, SATA 3Gb/s, 7200rpm, 32MB Cache, 8.9 ms, NCQ £108.97 £125.32
LN26294
1792MB Gainward GTX 295 55nm, PCI-E 2.0 (x16), 1998 MHz GDDR3, GPU 576 MHz, 480 Cores, HDMI £309.29 £355.68
LN26454
Asus P6T Deluxe V2, Intel X58, SLi/Xfire, Sok 1366, PCI-E 2.0, DDR3 1066/1333/1600(OC), SATAII, ATX £183.17 £210.65
LN26793
12GB (6x2GB) Corsair XMS3 DDR3, PC3-12800 (1600), 240 Pin, Non-ECC Unbuffered, CAS 9-9-9-24 £161.97 £186.27
LN26865
Pioneer BDR-203BK-SW 8x Blu-Ray Writer x8 DVD±DL x16 DVD±R x6 DVD±RW Writer internal Black SATA OEM £138.99 £159.84
LN27179
Intel i7 950, Socket 1366 (B), Nehalem, 3.06 GHz, QPI 4.8GT/s, Cache 8MB, 22x, 130W, Retail £374.17 £430.30
LN27458
Samsung SH-S223B/BEBE 22x DVD±R, 12x DVD±R, DVD+RW x8/-RW x6, SATA, Black, OEM £14.85 £17.08
Recalculate Basket
Net Total
Carriage
VAT
£2,138.13
£19.54
£323.65
Total£2,481.32