Right I've had the same PC since I left uni, which was 2002

Its so painfully slow, and I'm having to back things up to CD just to make space on my HD.

I've totally lost touch with PC componants over the years, I have no idea whats what now.

I want it to be a decent spec game machine, with plenty of space for all my tunes.

Don't mind building it myself.

Whats a good spec, and whats it going to cost me?

Ideally I want to keep my current HD, but not use it as a boot drive.