Not sure I agree with you on that.... And I had this exact same "spirited conversation" with Jule last night on the phone regarding tonal advantages of the pricy Demeter power amp for Monique.
IME, there is not much of a difference in Monique's tone with my all tube Mesa, my SS Crest power amp, the ART SLA-1 and various other amps I have tried with Monique. Headroom being equal, power is generally power IMO.
The main reason I need more than just my current Crest poweramp is that I own a dove cage Monique, but also ordered a rack Monique. Long story, but owning just one amp isn't an option for me based on my travel schedule and luggage issues, multiple rehearsal spaces, too cold to leave gear in my car in the winter, etc. I am selling my Mesa D180 to fund the majority of my rack Monique is anyone is interested.