Mac user here also. Why not set up a server, a nice G5 maybe (or one of the old G4's that had more bay space) and then just toss a cheapie G3 ibook off of ebay into your listening room. Or, if you do get the G5, which is a pretty cheap alternative considering other options, you have the digital outs. Only pitfall being the lack of easy control with your existing or nre remote system, but with a little ibook sitting there, its not tha big deal.