I think that it might depend on what you most find glorious in your listening. I have owned several good to great PP amps; for many years I used the renaissance VAC 70/70, 2 parallel 300Bs per phase per side. This amp did everything superbly well. Eventually it needed TLC and yet more tubes (and a matched quad of good 300Bs is a bit painful) and I switched to the (SS) Pass XA 25.
The lure of tubes got me again and I have built a couple of Elekit SET amps.
The performance of the TU-8900 (with upgraded caps and OPTs) is utterly glorious, most of the time. Its rendering of subtle details, at low volumes especially, makes one stop breathing so as not to interfere! It does this in a way unmatched by the VAC amp.
The one technical advantage of a single ended design (or an SS amp) is that there are no OPT zero crossings. Even in full class A, where the tubes are biased out of cut off during a complete cycle, the OPT is still at zero (given perfect channel matching) at signal zero.
I listen to a lot of chamber and choral liturgical music where the ability to reproduce ppp passages, and the decay of notes, superbly is a vital factor in my enjoyment. The performance of full ffff orchestral tuttis is not on a par with a great pp amp, but note that my Rockport Atria speakers are rated at 87dB at 2.83v rms.