The best preamp for Rouge M-180

Hmmm, I have been very pleased with my Musical Fidelity kW linestage with my Rogue Stereo 90 (and with everything it has been paired with). A hybrid pre with a big meaty power supply and very very low output impedance.

Not balanced though. And I settled on this preamp before I got my Rogue, so I have not had the chance to swap around pres with this specific amp.

It also might help to know what you have not been 100% pleased with, and what pres you have tried.

The 6moons review of the 36.5 is fairly comprehensive IIRC. While not a tip-to-tail balanced design, the Modwright LS100 might also be worth looking at. And the Wyred4Sound preamp also gets a lot of praise. I was very close to buying the W4S when preamp shopping, but could get my kW used for the price of a new W4S (and I am a sucker for a big power supply).

I don't see any reason it might not be a good match. Usually SS preamps have lower output impedance, which is a good thing in terms of matching with amps (you want at least 10x less than the amps input impedance across the frequency spectrum).

I'd check that the impedance matches. But then it will likely be a matter of personal taste.