Asrock 775 DUAL-VSTA £40ish from some online retailers.
I've managed to spec a system for £500ish everything apart from the optical drives which my friend already has.
Asrock 775 DUAL-VSTA £37
1GB (2X512MB) Corsair Value Select, DDR2 PC5400 (667) £58
300 Gb Maxtor 6V300F0 DiamondMax 10, SATA300 £62
Intel Core 2 Duo E6300 S775, 1.86Ghz £151
Coolermaster Cavalier 3 Silver Chrome Finish £45
CoolerMaster Hiper L3 LGA 775 extreem silent Heat Pipe £18
256Mb Gigabyte PCI-E GV RX80256D - Radeon X800 DDRIII £106
480W Silent pPFC Power Supply AMD & P4 Ready 12cm £15
only things I'm not sure on are the graphics card
Not sure if I can get better bang for my buck with a cheaper card, recommendations pleasae around the £70ish mark would be good.