Well, I didn't find audio nirvana like I was hoping for. The 2 amps, after running their audio software, each have a distinctive sound all their own. The Denon may actually sound marginally better. Unfortunately, no night and day difference. Both play too bright for my ears at upper volume levels, around the 80-90 db range. Turning MCACC off didn't sound bad at all, except there was too much bass.
I moved the upper speakers, over the Tv to a straight ahead position, so the teeters are no longer pointing to the seating area with little change in results.
System actually sounded the best with the smaller TV, with the on walls mounted above the bookshelfs. I'm not going back there, so will have to keep tweaking.
Pioneer, I set mains to small with cross over at 80.