Hello all, thank you for the feedback.
I have been seriously looking at the Quicksilver horn mono's.
Until I can save the scratch for those, I'm leaning toward the Mac 240.
Reason being is when I had the Rogue RP1 pre into the Atlas III, it was very noisy. Very audible hiss when I owned a pair of Klipsch Heresy IV. The Mac was much quieter.
The folks at Rogue explained it as gain structure and noise floor. I get it. (rolling some input tubes helped a little)
That's why I'm thinking that the Quicksilver Horn Mono's with their noted input sensitivity would be a good match. (or am I off base).