This topic should be in the amp section, but seems no one minds.
I've not heard the 845 "set" amp. My limited experience with the 300B , Cayin with Silverline Sonata, was that it was great with light jazz, but even with these high sensitive speakers the bass and highs were not spectatular. With classical it fell so falt that it was unlistenable. Zero dynamics. I've heard several 88 amps , plus had KT88's in the JOR and the results were not near the KT90's dynamics. The bass and treble was much superior in the KT90's vs the "fluffy" KT88's. I wrote to the seller from which I demoed the KT88 amp, and he said, "that fluffiness is the character of the KT88 tube". As much as i loved the mids of the 300B on jazz (although the Sonatas "barked" on certain fq's with vocal's) it was extremely limited for classical.
So I just can't see myself having the wonderful 845, 805, 300 tube amp and always in search for the ideal speaker. i've found my ideal speaker and am lucky that I've found a tube amp that delivers classical. Which is the JOR KT90. If the Jadis did not deliver classical with dynamics,, nor any other tube amp, then I'd go ss amps with my ideal speaker. Speaker comes first, amp comes second.
I could not deal with a tube amp that has limitations. It absoluetly must be VERSATILE.