I own a modest Master TSM by Merlin, until now driven by Berning ZH230 - David Berning said I needn't bother to go the way of the Q'z, as they share the same sound on different powerlevels (who knows..)
Actually completely happy, but might I direct your attention to my current alternative:
http://www.audio-consulting.ch/?Products:Amplifier:MIPA_120_Watt
I am using the smaller 30W MIPA (mains independent pa) and it is - dare I say it - equal to the Berning, as fast, but so calm, I can't believe it. I have a slightly difficult setup in my studio, with a grand piano between the speakers, but the fact that you can hear a grand piano, but nobody sitting there, that vision only struck me with the Audio consulting, so it must do something right.
(ps no affilitation, and what's more, I keep the Berning anyway!!)
Egidius