Oh - just thought of something else - be sure to set up the ZP80 as "fixed volume". If you've got it set to the default "variable output" it will digitally control the volume and, at lower volume settings, this could provide poor sound. You definately want the 861 to control the volume.

BTW - 30MB per song with lossless is probably about right (same as Apple lossless).

Main system: Cable, Apple TV, HD621, G68D, AC11, 218, DSP7200SE (L+R), DSP3200 (L+R Rear)
2nd system: Cable, Apple TV, MC200, HD621, 568.2, M3100 (L+R)