need help picking PC parts out ****budget 800 pounds****

So my budget is £800 - I could stretch it if needed but i dont really want to go above that. I'm looking to build my first gaming PC and need help picking compatible components - here's some of the games I will be picking up in the near future: Battlefield 3 (would like to play on high settings), Fifa 12, The Old Republic

I think once i have compatible parts i'll be able to follow the guide on these forums - can anyone advise me a list of compatible parts please that would be able to run the games above smoothly please? :-)

Here you go, I used www.overclockers.co.uk.

Its will all work together and will play those games very very well.

thank you so much! you don't think i need to go for the GTX 580 then?