Looking to move to a Tube Integrated setup

Yes, better sound was what my ears perceived. Also true regarding the primaluna bridging, though the unit I’m considering has KT120’s already, and as my main speakers are full range and 98dB at 1 watt, I don’t really think I’ll need to do dual mono, though it is a nice option.

With your speakers you need to be looking at something Single Ended(1 pair of output power tubes),Pure Class A..If you listen to strictly vocal/elevator/pipe & slippers music the 300B is the way to go..If you listen to a variety of music then KT88/KT120/KT150/KT170 would get the call...There is also Single Ended Class A EL34 but I prefer the bass & mid bass of the Pentode tubes..
There are several manufacturers making such amps like Mastersound Icona,Icon Audio ST30SE,Unison Research Preludio,Rogers Audio 65V2 & the Lab 12 Suono Mk.II...

I do listen to a wide variety of music. Classica, choral and jazz to blues, country and rock

I would look seriously at the AudioResesrch I-50. If your moving from as then this is probably the musical sound you are looking for. Very natural, outstanding rhythm and pace with great detail. Built like real audiophile equipment. I own PrimaLuna and my main system is Audio Research. The ARC is in a different class.

Those tube amps are likely overkill for 98db speakers.  What is the make and model of the speakers?