I can't help much with the wire management since I've been fortunate enough to build my last 3 theaters from scratch. My first one was "interesting" but it was a dedicated room... It had a TV though, so all electronics were in the front of the room and behind that wall was an open storage room, so I had access to everything. I just needed to run speaker wires, and I stashed them under the baseboard molding/trim just above the carpet. I then drilled holes in the walls and used fishtape to get to the bottom of the wall where I notched out (instead of putting a hole in it)the wall. I fed wires up, and then replaced the trim boards.

Of course, that is when I knew nothing, and I probably had something like 22ga speaker wire (j/k, it was bigger than that, but maybe only 18ga)...

I know nothing about the Onkyo line-up either..

Man I suck!

Farewell - June 4, 2020