Secondhand MacBook Pro.
Have you seen his sig?! Pretty sure he DOESN'T need a desktop. Have a look at the Dell Studio a few of us forum types got, the thread is near the top of the list. Typing on it now, its really nice, screen is excellent, and can cope with games competently as well as all the other stuff.
Its £430
I get very annoyed by people who buy laptops when they really need desktops.