Welcome to the forums, slightly over budget but if you want to put it under budget you could either get the Leadtek 640mb 8800GTS (on pre-order) or any 320mb 8800GTS.
Noctua NH-U12F (Socket LGA775/754/939/940/AM2) Heatsink £32.99
(£38.76) £32.99
(£38.76)
Corsair HX 520W ATX2.2 Modular SLI Compliant PSU (CMPSU-520HXUK) £59.99
(£70.49) £59.99
(£70.49)
Logitech Cordless Desktop EX-110 - Retail £17.99
(£21.14) £17.99
(£21.14)
Dell E207WFP 20" Widescreen LCD Monitor - Black £164.99
(£193.86) £164.99
(£193.86)
Lian-Li PC-7 PLUS Aluminium Midi-Tower Case - Black £49.99
(£58.74) £49.99
(£58.74)
Optiarc NEC AD7170S Serial ATA 18x18 DVD±RW Dual Layer ReWriter (Black) - OEM £17.99
(£21.14) £17.99
(£21.14)
Western Digital Caviar SE16 320GB 3200AAKS SATA-II 16MB Cache - OEM £48.99
(£57.56) £48.99
(£57.56)
Asus P5N-E SLi nForce 650 (Socket 775) PCI-Express DDR2 Motherboard £69.99
(£82.24) £69.99
(£82.24)
GeIL 2GB (2x1GB) PC6400C4 800MHz Ultra Low Latency DDR2 Dual Channel Kit (GX22GB6400UDC) £49.99
(£58.74) £49.99
(£58.74)
Intel Core 2 Duo E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - Retail £124.99
(£146.86) £124.99
(£146.86)
BFG GeForce 8800 GTS OC 640MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail £219.99
(£258.49) £219.99
(£258.49)
Sub Total : £857.89
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 is being charged at 17.5% VAT : £152.75
Total : £1,025.59