My most recent experiences have been surround from either an Oppo 105D or Sony XA5400ES via HDMI, and both have functioned flawlessly whether the prepro was a Cary Cinema 12 or Bryston SP3. But at one time I did connect the Oppo via 7.1 analog to the Cary, and that also functioned flawlessly.
Part of the problem with the Esoteric seems to be an elaborate settings menu with inadequate explanation. If I didn't have the Ayer C-5xeMP, I might be inclined to just set up the SA-60 for stereo and forget about surround from it, but I do have the Ayre and surround was the reason for buying the SA-60.