Also got the Winhester 300+ in as well - at £103.85 inc VAT, it's a hell of a CPU, and possibly bettrer if you hold out for several steps above to get cheaper later!
http://www.ebuyer.com/customer/produ...duct_uid=79190
Cheapest motherboard you could pair it with
http://www.ebuyer.com/customer/produ...duct_uid=64800 - £78.71 inc VAT
But if MSI left some wiggle room in the BIOS, the Nforce 3 is a decent overclocking solution due to the AGP/PCI lock
http://www.ebuyer.com/customer/produ...duct_uid=77870
If you intend overclocking, I'd suggest better than DDR400 RAM, to avoid having to use the memory dividers