Motherboard: MSI KN8 NForce 3 - 70pounds. - Link: http://www.ebuyer.com/customer/produ...duct_uid=77869
I'm not just advising this motherboard because I have it ;-), if you are looking for a gaming PC you'll need a good graphics card either Geforce 6600 or 6800 depends on which one you need apart from the 6800 is alot more in price.
6600GT - PNY Geforce 6600GT - 139pounds - Link: http://www.ebuyer.com/customer/produ...duct_uid=81344
Hmm, what you know same motherboard and graphics card, I'm purely going off reviews and cost for the graphics card.
6800 - 189pounds - Link: http://www.ebuyer.com/customer/produ...duct_uid=78903
The above is standard 6800. The one below is GT.
6800GT - 226pounds - Link: http://www.ebuyer.com/customer/produ...duct_uid=66090
Any higher-end cards are too expensive for your budget.
Processer: AMD 3.2, 3.4, 3.5 - After 3.4Ghz the price shoots up.
3.2 - 122pounds
3.4 - 142pounds
3.5 - 172pounds.
All prices are inc.VAT
Gfx Card: (Say 150 for arguements sake.) 150
Overall Price: 360 this isn't including Shipping but they are all from Ebuyer.co.uk