To keep prices down, if it's an issue for you, you could always get an e6400 and a gigabyte 965p-ds3 mobo.
To save on graphics, unless you really want dx10, an x1950xt will do, and they go for $220 AR on newegg, dunno if you'll get near that in the UK.
Get a LianLi or ChenMing case for...