Mark,

You are correct. With a few exceptions, there are "virtually no posts that are really informative about the M50s or the M40s" here on the forum. Hence, your well written and thoughtful review is most welcome.

I think the lack of information on the M40s and M50s here on the forum, is less due to "bias" than it is to lack of experience. It's difficult to be informative about a speaker you've never heard and with which you have no experience.

Jack

"People generally quarrel because they cannot argue." - G. K. Chesterton