Unison Research vs Moonriver.

I’m looking to downsize, am wondering which amp better for Harbeth SHL5 XD, Rosso Fiorentino Certaldo 2 or Unison Research Max 1?

What would be best pairing for Jazz, Bossa, Soul, Funk, Flamenco, Classical, and some classic rock and Reggae from 60-80’s?

Thanks in advance.