In my two experiences with M80s in different rooms I have been pretty impressed. Begs the question what the M100s bring to the table in addition in real world use. Harder to push them in installs. Pretty big. Havent met the right room yet.

Still think the M5s are an endgame speaker for all but big and dedicated rooms. Give them power and holy cow! Mid sized rooms and dens. Slam dunk.