Just going as a base unit specification I'd aim for something like this as a good balance between performance and price, there are of course faster options in some areas but price can get a bit out of hand.
Lian-Li PC-7 PLUS Aluminium Midi-Tower Case - Black £48.99
(£57.56) £48.99
(£57.56)
Corsair HX 520W ATX2.2 Modular SLI Compliant PSU (CMPSU-520HXUK) £61.99
(£72.84) £61.99
(£72.84)
BFG GeForce 8800 GTS 640MB GDDR3 HDTV/Dual DVI (PCI-Express) - Retail £294.99
(£346.61) £294.99
(£346.61)
Corsair 2GB DDR2 XMS2 Dominator PC2-6400C4 TwinX (2x1GB) £174.99
(£205.61) £174.99
(£205.61)
Intel Core 2 DUO E6600 "LGA775 Conroe" 2.40GHz (1066FSB) - OEM £177.99
(£209.14) £177.99
(£209.14)
Asus P5W DH Deluxe WiFi (Socket 775) PCI-Express DDR2 Motherboard £129.99
(£152.74) £129.99
(£152.74)
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)
Tuniq Tower 120 CPU Cooler £28.99
(£34.06) £28.99
(£34.06)
Sub Total : £996.42
Shipping cost assumes delivery to UK Mainland with:
City Link Parcel Next Day (Delivered Mon-Fri)
(This can be changed during checkout) Shipping : £10.95
Vat : £176.29
Total : £1,183.66