I've suddenly become much more patient about this, since I just did a side-by-side comparison of a CD played on my Denon with the same CD in FLAC form on my PC, output from the Juli@ (which does the DAC). The difference is almost imperceptible. I don't know if that means my Denon has a crappy DAC or that the Juli@ has a great one, but either way things are pretty nice the way they are.