DB6
www.insight.com/uk and
www.dabs.co.uk provide excellent product range, competative prices and will deliver free within 3 days when spending over £30.
Cpu/Mobo, I can recommend Intel PIII 450 with Abit BE6 motherboard. Be6 great board for overclocking and supports eide ata66, also comes with superb hardcopy manual.
Overclocked my pc to 558mhz with this combo.