Solid state amps simply do not impress me Paul.  And, contrary to belief, it has nothing to do with distortion as both of my recent valve amps exhibit THD figures below supposed audibility.

So yes, I am "invested in the mere idea of using tubes", simply because IME they sound closer to reality when correctly utilised.

I cannot quite grasp your point, unless you are suggesting that a quality ss 70 wpc power amp (NAP250?) can sound as transparent and natural as an amp like this. In which case, I'd recommend a listening session.