Scotty:
How about using Songbird instead to play 96/24 files from places like HD Tracks? I wonder if that would work over HDMI. Steve - maybe you can give it a try, download songbird and get the free album from HDtracks.com and see if the receiver with play the 96/24 tunes. This assumes the receiver you have can handle 96khz/24-bit streams, but it should if it is fairly recent, I think. If you get it to work let us know if it sounds any better than CDs to you.
OBG