What about 845 tubes on Wilson Sophia 3...?

Hal123,
Mcintech's comment is based on actual listening experience rather than
speculation and has legitimate value. All 845 amps aren't created equal so
some will be more successful than others. It appears the Nagra VPA 845
amps would be a very good choice. I understand your interest, at CES this
year I heard the Absolare Passion 845 PSET 50 watt amplifier completely
outperform the SS MSB amplifier driving the magnificent Rockport Altair
speakers in a very large conference room set up. It was quite a startling
contrast.
Regards,
Regards,

Hal123,
It seems you trust your ears and choose based on what you hear, that's commendable. You weren't enamored with high power specs, congratulations on obtaining the Quads. I didn't know the Sophia was so easily driven, I like good quality lower power amplifiers(with appropriate speakers).
Regards,

Thanks Hal for the kind comment about my system.