Need a new pc

Heya
I'm going to uni in september, I really need to get a computer.....
I've got about £500 to spend on one, i've already got a good mouse, screen and speakers, just need a case, mobo, graphics card, RAM, fans etc..
It's going to be used for gaming (if possible for that amount) and doing research on the net.
What would anyone recommend for components?
Cheers :)

you should post this late in august, prices for components change all the time

Buy ram now, buy the rest later.

yea.. buy enuf RAM to fit all your PCs...