All,

Thanks for the input. I will try the 518 in the loop and report back. Unfortunately, Mortod, the 596 does not have a second digital output, so I will have to rewire and reconfigure to try the 518. Would love the opportunity to a/b immediately, but...

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)