PREAMPLIFIER UPGRADE QUESTION

You’ve got great speakers. But without question you need a tube preamplifier!

I am a beleaver in a tube preamp and ss amps. None of your choices would be on my list because I like everything to match (I am weird like that). Good luck with your decision!

Most posts here recomend the device they own and listen at home. That's a good thing because they love what they heare. Ultimately, that is also your goal.
My recomendation for you: Ask your Conrad Johnson dealer for a demo or better if he could lend you a ET6SE for a month or so. I bet you will refuse to return the device. All combination tube preamp combined with a solid state amp I've heard did sounded exeptionell. Allways better than cominations like tube/tube or solid state/solid sate.

Don't leave out the Wyred4Sound STP-SE. It has the unique properties of both passive and non-passive architecture. Very neutral without sounding dead.

Thank you all for your kind and instructive responses. My choice is between preamplifiers as follows: Conrad Johnson:ET6 SE, Rogue Audio RP-9 and Bryston BP-19. Just purchased the Bryston 4B3 cubed power amplifier. The reason that I am limiting my future purchase to the three listed is because my dealer is a representative of the three above listed. He represents others as well, but they are not within my budget. In any case the dealer's knowledge and service is excellent and would like to continue working with him. The problem with the Conrad Johnson is that it does not have a balance control which I require. My current Rogue Audio RP-1 has one and I find it essential.