@denon1 @russellrcncom In addition to the Pass XP20 - XA30.8 pre and amp combo, my T+A PA 3100 HV was compared, in home and over time, with these integrateds: the Lyric Audio Ti140 MkII; MastersounD Evo 845 (briefly, but in home); and the Ypsilon Phaethon; prior to my making a final choice.
I stopped additional comparisons because I was more than satisfied with the T+A. And, to be honest, though comparisons can be fun and exciting, they take energy and time to coordinate, setup, break in, and evaluate; not to mention taking away from the pursuit of purely enjoying the music.
I also needed to get busy optimizing my system with the T+A as a key component in it.
Recently, I've been running comparisons between the T+A and my Grandinote Genesi Preamp and Scott Sheaffer's Found Music 2A3 mono amps.
All in all, I have compared the T+A PA 3100 HV with a solid state pre-amp combo (Pass), two tubed integrateds (Lyric, MastersounD), a hybrid tube-solid state integrated (Ypsilon), and a solid state pre with a low watt SET amp (Grandinote + Found Music).
I found all of the amplification chains highly satisfying and I can easily recommend each one, though with caveats for each.
This doesn't need saying, but one's preferences, goals, room, and system synergies will play a far greater role in choosing one over the other vs. simply the component on it's own merits.