Not directly to your question, but I had a good experience with the Dynon radio in a panel upgrade of my RV6 a couple of years ago. I wired the Dynon radio and the com from a GTN650 through the Dynon intercom, using two switches instead of audio panel. One switch was between the two coms and the other turned the Nav audio from the GTN on and off.
The RV6 is sold but I have thought about adding a second com to the RV12. If I do it, I will try to use the same approach. On the RV6 it was easy with the pure Dynon install. I have not researched how much the Vans proprietary stuff would complicate it.
More to your point, once I learned to use the features I really liked the Dynon radio and how it operated with Skyview.
Built RV6 #756, 1989-99, flew until selling 5/2016.
Built RV12 #533, 5/2011 to 11/2012, flying