If you mount the m5ow with the tweeter at 10º below ear level will the sides/back of the couch affect the sound of the midrange drivers if they are below the top of the couch?
Mount 5’ to tweeter. Then you are fine.
If you go with an M3OW same if you want.
I left 5’ or so off your sidewalls for in-ceiling Atmos locations -so plenty of seperation to get well defined height vs side sound if you are worried about 5’ to tweeter.
I am going to invert my sidewall M5OWs because my ceilings are 7’6”. I would like to get my tweeters down to 4’6” if possible. Much smaller room than yours.
