I recall you making that comment, oh,.....I don't know......bout three or four years ago? Quite some time anyway. One of the points made that gave me pause in purchasing a set of M50s!
Ian published an NRC plot during the Holidays last year that showed the bass hump and the yucky stuff around 1 to 2k being cleaned up in comparison to the M3. Don't know if they made some mods to the M50s since you last auditioned them, but all in all they aren't a bad speaker. And they do match up extreemly well with the M3s that I'm using in all other positions in my system.
We are using them mostly for HT and TV viewing and they give no reason for complaints, and in some respects do seem to surpass my favorite M3s!!
For serious listening, I will be using M3s in the smaller stereo only system.
Soons I figure out what to drive 'em with