Any comments about the JMLab Mezzo Utopia?

Is this a good speaker for rock and classical music? How much power does it need to be driven well? Can it play loud?
Not great for rock imho.

Better values out Dyn 1.3SE, Ann 25 etc.
Excellent for reproducing acoustic instruments. Not good for reproducing anything that is amplified/distorted/proccessed such as electric guitar or synthesizer.

I would recommend 100-200 wpc SS amps, but they can sound good with 50 wpc tube amps.