Many like the Harbeth sound, some less so:
http://www.10audio.com/harbeth_m30.htm
It is interesting the reviewer describes the M30 as having a boxy sound with the enclosure significantly contributing to the overall presentation although Harbeth speakers are designed to have minimal coloration from the box enclosure with their "lossy" cabinet approach. The Stereophile review of the 40.1 by Art Dudley was a more comprehensive and favorable one though.
That was one quick decision by the poster of the thread in going for the 40.1. Guess he really liked the SHL5. Looking forward to the comparison as much as my rendezvous with the 40.1 in a different setup this Sunday.