As far as I am concerned, there is no such thing as good "rock" speakers, or good "classical" speakers. If a speaker is accurate, then it is accurate for all music. I would suggest that many rock CD's are poorly mastered, whereas more care is taken with mastering classical and jazz. Your M22's may simply be revealing the shortcomings inherent in your CD's.

Mark

"Shoot, a fella could have a pretty good weekend in Vegas with all that stuff"