Something like this might do your friend, good solid mix of components and can be overclocked very easily.
Arctic Cooling Freezer 7 Pro CPU Cooler (Socket LGA775) £14.99
(£17.61) £14.99
(£17.61)
Corsair HX 520W ATX2.2 Modular SLI Compliant PSU (CMPSU-520HXUK) £57.99
(£68.14) £57.99
(£68.14)
Seagate Barracuda 7200.10 250GB SATA-II 16MB Cache - OEM (ST3250410AS) £37.99
(£44.64) £37.99
(£44.64)
Samsung SH-S203BEBN 20x20 DVD±RW Dual Layer Serial ATA ReWriter (Black) - OEM £16.99
(£19.96) £16.99
(£19.96)
Akasa AK-ZEN-01-BK Zen Black Case - No PSU £26.99
(£31.71) £26.99
(£31.71)
Gigabyte GA_P35C_DS3R (Socket 775) PCI-Express DDR2 & DDR3 Motherboard £69.99
(£82.24) £69.99
(£82.24)
Sapphire ATI Radeon HD 2900 Pro SILENT Heatpipe 512MB GDDR3 VIVO TV-Out/Dual DVI (PCI-Express) - Retail (21119-00-40R) £149.99
(£176.24) £149.99
(£176.24)
Intel Core 2 Duo E2160 "LGA775 Conroe" 1.80GHz (800FSB) - Retail £44.99
(£52.86) £44.99
(£52.86)
OCZ 2GB (2 x 1GB) PC2-6400C4 Dual Channel Platinum Revision 2 XTC Series DDR2 (OCZ2P800R22GK) £41.99
(£49.34) £41.99
(£49.34)
Sub Total : £461.91
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 is being charged at 17.5% VAT : £82.75
Total : £555.61