@rtorchia Your personal experience is valuable.
But tube amplifiers make sense if you're looking for a low damping factor. Modern amplifiers typically have a very high damping factor (ideal for a 2 or 3 way speakers with crossovers). But if you're using a fullrange driver you want a low damping factor for fuller bass. Tube amplifiers typically have a lower damping factor.
My point is: ASR neglects equipment matching because they review products in isolation.
I anticipate being called a moron by an ASR member for even mentioning fullrange drivers and tube amplifiers.