Commodore computers were badass. I have both a C64 and C128 that haven't received NEARLY enough love from me lately. Don't have an Amiga, though. They're kinda expensive.
In a way, you could argue that the C64 was in many ways one of the precursors of the "gaming PC," with its great graphics and sound for the time. Although, unlike gaming PCs today, it was reasonably priced.
Hmm...this thread makes me want to boot mine up!