I can say that i find the PPX and MPX models to be among best of their time and still are very very good sounding amps in their class, if still not the best in their class. Now, this is my opinion. But I am willing to bet that if i took 100 random samples of people who have heard these amps and their competition, over 50% would agree with me. I don't there's even any controversy about this, is there?
"The evil that men do lives after them, the good is oft interred with their bones."
Now, since I am anticipating the "Hitler guilt by association argument", I will also say, equally unequivocally, that Hitler was NOT a good artist.