I've been on Audiogon for over five years and have wondered at times why there hasn't been much said about M&K. I do know that in the last ten years or so their emphasis has shifted more towards home theater, so that may be the reason.
I remember about 15-20 years ago when my local [and now defunct] Wherehouse record shop was the flagship store for that chain. This store had a separate classical section that was in its own large glass room. One day, I walked in and noticed that it was actually fairly sonically isolated from the loud music circulating through the rest of the store. An adagio movement from a piece I don't remember was softly filling the room. Four small M&K satellite speakers were mounted amid the posters, standees and other displays near the corners of the room. Then all of a sudden some very low yet nicely defined and nuanced bass emanated from nowhere. I was so impressed because until the subwoofer made its presence known, I had no idea it was even there, but when it did it did so in a subtle yet powerful way.
During this phase of my life I was mostly into car stereos, and this first experience with "quality" bass really impressed me. I searched around for the source of the low frequencies and found that an M&K subwoofer was actually hidden in plain sight on a table amid the CDs, LPs and promotional display material.
Thinking back on that experience, I'm shocked that the M&K sub exhibited such good tone sitting on a table. Obviously, some care was taken in setting up the system in that room. I think it'd be cool to own equipment from that era like those M&K sats and sub, and some mid '80s ADS speakers.
Sorry to respond with such a longwinded diversion, but I'd kinda forgotten about M&K and your thread brought me back to that experience. As Rx8man suggests, for movies M&K, Velodyne, Def Tech, etc. are excellent choices.