I'm thinking of buying a either a used iMac G4 or a new Mac Mini as a second computer. I have a spare keyboard & CRT monitor to use with the mini but I really like the one-piece iMac. Need advice. Which should I buy? What minimum specs should I look for? What's a reasonable price for a used iMac G4 (min 1Ghz, 512 meg Ram, 80 gig HD, USB 2.0 & airport card). I don't need a super drive model, got one on my iMac G5.