In terms of design, component and build quality I too would have to give the checked flag to PASS LABS (Nelson Pass "FIRST WATT")
If a tube amp, was your preference then the award would go to AYON for the same reasons. Performance in both cases would excel, paired with virtually any of the top-ranking loudspeakers, both past and present,
The other amplifiers you have mentioned, and also several that you have not mentioned would fall closely in line, especially if your budget has limitations.
Another aspect that I rarely see mentioned is resale value. You rarely see a PASS LABS amplifier or other component on the used market. That in itself, says a great deal about NELSON PASS'S designs. Furthermore, you almost never see any of the PASS LABS products obsoleted or updated. They remain a standard year after year. If you have the funds, hopefully this will help in the decision making.
I would also lean in the direction of a pair of monoblocs and their top tier preamp (That's if I could afford it)
One final passing comment; - - - Quite recently, based on performance for the buck, I recommended to a close friend, a pair of PARASOUND monoblocs and their top tier preamp. Paired with DYNAUDIO "SPECIAL FOURTY" Floor standers. After 30 days his appraisal was absolutely, and totally " incredible realistic sound."
My friend also happens to be a musician.
And much less expensive!
.
