Mmmm.. depends what ya want a computer for. If you do a load of video editing or do plenty graphics stuff, disk space and some power is useful :-)
I like a lean box designed for a specific purpose with minimum crap, either "features" in hardware terms or unnecessary software.
Hell.. gimme a few $20 text editors, a copy of ActivePerl and any box and I'll be happy auto producing decent websites in under 4 minutes each - simplicity is king!
