Recommend a good laptop?

This one has impressive specs for its price (£249):
http://www1.euro.dell.com/content/products/productdetails.aspx?c=uk&cs=ukbsdt1&id=vostronb_1310&l=en&s=bsd

And you can customize with better gfx card and other things and have an awesome machine for less than those £500 :)