Thanks for the quick suggestions. I 'll take a read over the reviews for the Corsair PSUs, but I've heard nothing but good things, so I guess they'll be solid.
The soundcard is a personal thing, I've had so much trouble with onboard sound in past machines that I just prefer to have outboard sound. I've had an X-Fi fatality in my current machine for about 3 years and haven't had a single problem.
Do I need 4GB of RAM? probably not, but with Vista eating up whopping amounts and games taking more and more added to the low price of it at the moment, I think it's more of a piece of mind thing.
I'll take a look at those case suggestions too.
Thanks guys