Eblack, given the dimensions of your room, the M5 is likely giving you useful bass down to 28Hz because your room is boosting all frequencies from 56Hz and below. At about 28Hz, the M5s in your room put out about as much energy as they do at 80Hz. And it sounds like AccuEQ is doing a decent job of flattening any peaks across that range which makes the bass less muddy and more enjoyable.
So you're all set for music unless you listen to the pipe organ. But since most of your time is spent on movies, you may be missing any low frequency effects that are in the soundtrack.
