Tubes and less sensitive speakers

Regarding the poet by @blisshifi: Mating subs with Maggies (in fact any and all dipole loudspeakers) is indeed a challenge. The solution is a dipole subwoofer, which Magnepan has been working on a for a few years now.

There is already a real good one available, the Rythmik Audio/GR Research Open Baffle Servo-Feedback Subwoofer. It employs two or three (your choice) 12" servo-feedback-controlled 12" woofers in an open baffle frame, and works splendidly with dipole loudspeakers. Check the GR Research website for details.

I have no personal experience with the Sanders Magtech amps (other than reputation), but they are manufactured by CODA, and that is never a bad scenario

Many years ago when they were current products, William Z Johnson came to our local dealer to demo his new model Maggie Tympani.  He was using ARC tube electronics, including large amplifiers.  That system sounded absolutely wonderful and with a wide varied of music.  Of course there was a connection between Magnepan and Audio Research for many years.  But tube amplification can work well if of sufficient power.