I'll second or third (or whatever) the roll-it-yerself recs. I've got a mac mini (very quiet) in my main rig hooked up to a dCS stack via a Waveterminal U24--seriously can't tell the difference between that and my DV50s as a transport. I've got a terastation full of Apple Lossless files on my network playable through that, or the Win XP box in my study. Pretty remarkable. I'm waiting on delivery of a couple squeezebox 3s to replace some audiotrons in my house (the SQB3s will do Apple Lossless, the A'trons won't). Convenience/space savings is fantastic. If you want to stay in the Windows family, you can also pick up a super small form factor PC for about $600 that is fanless and use that the same way as a mini.
