I'd recommend this:
http://www.apple.com/macmini/
Don't let renuzit talk you into running some hacker O/S that needs constant tweaking just because it's supposedly "free". Linux is only "free" for those whose time is worth nothing, and it's backed by radical leftists like Stallman.
FYI--I'm not trying to push him into using Linux. I've made myself open if he has any questions or want more information about it.
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I'll look into it.
Mac OS X contains a great deal of open source, much of which was created by hackers at Berkeley. Furthermore, Steve Jobs is a liberal and close friend of Al Gore, who serves on Apple's board.
Of course, these are not reasons to not buy a Mac, any more than Stallman's political ravings are reasons to not use Linux.