I think the Sqeezebox 3 would be a good item for you check out based on how you've said you'll be using it. You can have your CDs, etc., on an existing computer and still use the computer for normal computer duties. The SB can be either wireless or wired. I'm using it wirelessly with no problem. It's a very well thought out design - very easy to set up and use. I mostly use it to listen to Sirius and other streaming audio. The only weakness is the D/A but it does have an optical and digtial coax output. The D/A is Burr-Brown which has a reputation for being good. It's average or a little above average for a consumer device D/A. If you wanted it to really sound good and demodulate uncompressed digital from your hard drive, pick up a good DAC to run with it. I think you'd like it. The SB is a well-done device.
regards, David
regards, David