My experience with the Monique and M700 basically parallels yours. That said, I recently "upgraded" to an M2500. Jule graciously allowed me to keep the M700 until I've had time to do a comparison of the two, which I did, but unfortunately only under bedroom conditions until last night. I played the M2500 with a Monique and one Fearless F112 at a jam session. Admittedly not at normal gig volume (I never put the M2500 volume past 10 o'clock) but the verdict is: the M700 is going back to Jule. The M2500 basically provided all the goods as the M700, only the goods were gooder: more punch, more articulation, slightly quicker, a sense of having endless headroom, etc. The one caveat is that due to the M2500's massive power, one needs to be very careful with the volume knob.
I too see no reason to explore using a tube power amp.