I'm not totally sure that going for an 8800GTX at this budget level with all the other requirements allows a properly balanced system but I'm not going to be using it. 

 The components will allow a good deal of overclocking which I suspect will be necessary to balance it out a bit.
Microsoft Works Suite 2006 - OEM  £36.99
(£43.46)  £36.99
(£43.46) 
 Lian-Li PC-7 PLUS Aluminium Midi-Tower Case - Black  £48.99
(£57.56)  £48.99
(£57.56) 
 Microsoft Windows XP Home Edition inc. SP2 - OEM - 1Pk (N09-01528)  £49.99
(£58.74)  £49.99
(£58.74) 
 Corsair HX 520W ATX2.2 Modular SLI Compliant PSU (CMPSU-520HXUK)  £61.99
(£72.84)  £61.99
(£72.84) 
 Cherry Black CyMotion Expert (USB/PS2) Keyboard - Black (G86-2  £13.99
(£16.44)  £13.99
(£16.44) 
 Intel Core 2 DUO E6300 "LGA775 Allendale" 1.86GHz (1066FSB) - OEM  £93.99
(£110.44)  £93.99
(£110.44) 
 Corsair 2GB DDR2 XMS2 Dominator PC2-6400C4 TwinX (2x1GB)  £174.99
(£205.61)  £174.99
(£205.61) 
 NEC AD7170A 18x18 DVD±RW Dual Layer ReWriter (Black) - OEM  £18.50
(£21.74)  £18.50
(£21.74) 
 Seagate Barracuda 7200.10 320GB ST3320620AS SATA-II 16MB Cache - OEM  £59.99
(£70.49)  £59.99
(£70.49) 
 Belinea 2225S1W 22" Widescreen LCD Monitor - Black/Silver  £187.99
(£220.89)  £187.99
(£220.89) 
 Logitech MX518 Gaming-Grade Optical Mouse - Retail  £29.99
(£35.24)  £29.99
(£35.24) 
 BFG GeForce 8800 GTX 768MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail  £384.99
(£452.36)  £384.99
(£452.36) 
 Gigabyte GA_965P_DS3 (Socket 775) PCI-Express DDR2 Motherboard  £84.99
(£99.86)  £84.99
(£99.86) 
 Arctic Cooling Freezer 7 Pro CPU Cooler (Socket 775)  £13.99
(£16.44)  £13.99
(£16.44) 
     Sub Total :  £1,261.37 
Shipping cost assumes delivery to UK Mainland with:
City Link Parcel Next Day (Delivered Mon-Fri)
(This can be changed during checkout) Shipping :  £14.95 
  Vat :  £223.36 
  Total :  £1,499.68