One other worthy note of a recent change in my M100 system. As I've reported, my M100s did not disappear as well as the M5s in my main space. I re-arranged my furniture and now have a recliner at my MLP. I've found when I lean the recliner back a foot, the M100s completely disappear like the M5s.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated