Ron, I got around to hooking up my Bel Cantos to the little maggies. Initially I just did a quick hook up of the maggies to the HT Receiver (yeah I know, no comment necessary, it's a Pioneer Elite model???). I am not too much into HT, so this is just for my kids.
But the Bel Cantos Ref 1000 seem to sound quite nice with the maggies (which I have not hooked up in my main system yet). I am just running a pre-out from my HT Receive to the Bel Cantos into the maggies. The sound is a notable (unsurprising) improvement vs. the HT receiver driving the maggies. These were cheap speakers and it had been a while since I had run maggies in my house and I figured they would be nice to play around with, especially with the BC amps. I can understand why people like this combo. Though it certainly doesn't compare to the performance of my main system (again, unsurprisingly as none of the other components, cabling, room, etc. compare).
Outside of these notes, I can understand many of your comments on the class A, class A/B, class D and the tube amps. Not sure if I agree with all the comments as I have had a tough time finding anything outside of Class A that has performed as well "in my system". Though having had good tubed amps, I love the sound, hate my continuous concern about the tubes and maintenance insecurities. The sound can be great though.