Edge M series amps, how good are they?


I can find very little in the archives or in reviews on this series of Edge amps. They look like bank vaults as far as build quality is concerned, but how do they sonud? Why so little talk about them?
If you have experience with the line (especially the M series) or can direct me to reviews, I would apprciate the help.
Thanks, Scott
abbeydog
HP of TAS loves the Edge amps and has written at least a few articles in the last few years about them.
Gladstone provides too general statement.
I'd say it may depend on other surrounding components i.e. preamp and speakers.