Michael Kelly was the man that left ADS for Aerial.
I had the M15s. Very good overall, but the cabinets were a bit lively, and the highs a touch soft. But they did have some of the tightest bass I've ever heard.
I liked the L-series better.
The final M speakers, the M30s, were very good. Ugly, but very good. I hunted for a pair for years.