Thanks for all the informative responses.....glad I found out about the lack of input selector on the Plinius. I almost bought a used MA6500, but they're expensive, even used. And, I studied the physical measurements of the MA6500: those suckers are HUGE, for an integrated, esp. one with "only" 120 watts. Kind of defeats part of the purpose of using an integrated, at least for me. But I might take Aball's advice & at least check out the MA6400--is there a good site that describes older Mac gear in some detail?