err I got something like this:
AMD Athlon 64 3000+ Venice 90nm (Socket 939) - OEM (CP-130-AM) £59.95 £59.95
Asus A8V-E SE VIA K8T890 (Socket 939) PCI-Express Motherboard (MB-121-AS) £44.95 £44.95
OcUK Value 1GB (2x512MB) PC3200 184pin DDR Memory Dual Channel Kit (MY-004-OK) £47.95 £47.95
OcUK Value Rainbow Series Case Light Blue With 350W PSU (CA-002-RB) £19.95 £19.95
Leadtek WinFast PCX6600GT-TDH GeForce PCX6600 GT 128MB DDR3 TV-Out/DVI (PCI-Express) - Retail (GX-045-LT) £69.95 £69.95
Western Digital Caviar Special Edition 200GB 2000JB ATA-100 8MB Cache - OEM (HD-002-WD) £45.95 £45.95
Subtotal £288.70
Shipping (City Link Parcel Next Day (Delivered Mon-Fri)) £9.95
VAT £52.27
Total £350.92
PCI and socket 939 there so you can easily upgrade. I have also assumed you already have a legitimate copy of windows
You could also afford a slightly better motherboard there, that one is pretty much as cheap as you can get.