Simple answer to your question "not to highest spec"
depends what you want to do about dvd case hdd etc
Prices taken from overclockers.co.uk and all good componants cept mobo unknown by me
Asus EAX800XL/2DTV ATI Radeon X800 XL 256MB DDR3 VIVO TV-Out/Dual DVI (PCI-Express) - Retail (GX-077-AS)1 £189.95 . AMD Athlon 64 3000+ Winchester 90nm (Socket 939) - OEM (CP-114-AM) £76.95 FoxConn NF4K8MA-KS nForce4 Micro ATX (Socket 939) Motherboard (MB-000-FC)1 £49.95 Corsair 1GB DDR2 Value Select PC4200 Dual Channel Kit (2x512MB) (VS1GBKIT533D2) (MY-066-CS) 1 £69.95 Subtotal£386.80 VAT£67.69 Total£454.49