Hi. +1 to auditioning. It was an eye (well... ear, really) opener for me. And also, +1 for not mix-n-matching pre-powers. That Classe thing is sure worth looking into, Classe is a brand I like a lot.
If you find an ex-dem pair or some good deal, you might be able to fit Naim Nac-N172XS + Nap155XS, which imo is a great sounding duo. I don't like the Uniti 2 (it can sound a bit bright with the wrong speakers), but you might, so you could try that. 2 other amps I would look into are Arcam A39 and Hegel H180 (whcih, if I'm not mistaking, can also stream so it will provide a great sounding 1-box sollution).
As for speakers, I would look at ATC SCM11, Focal Aria 906, PMC DB1i - or, for floorstanders, Focal Aria 926, Neat Iota Alpha (or Omega, I forget what they're called lol).
As for speaker cable, I like DNM Reson (which I use), Chord Rumour 2 etc. Atlas Equator are great interconnects.