Wilson Sasha W/P amplifier pairing

I acquired a pair of Wilson Sasha W/P speakers this year. They’re Series 1 Sasha’s. Now trying to find great mono blocks to power them. My other system has Harbeth Speakers and a Pass Labs amp, I love the combo and can listen for hours without fatigue. I’d really prefer something warm and non fatiguing for the Sasha’s. 
 

Amps I’ve tried so far:

Pass Labs X350 - too bright and forward, etched vocals, not a lot of sparkle but plenty of authority

Pass Labs INT-30A - much better all around than the X350 but still too bright and forward. Not nearly enough power for Sasha. End result is too cold and thin

Bob Latino ST-120 - this is a $1200 kit tube amp I built. 60WPC. This amp was surprisingly kind of magical with Sasha.  Never fatiguing and full bodied. Unfortunately it went up in smoke because I can’t solder.

Mono blocks I’m considering:

Audio Research Ref 160M

Lamm 1.2 Reference

Pass Labs XA100.8

Preamp is a PrimaLuna EVO 400. Rega RP3 with Exact cart. Denafrips Ares II DAC streaming Roon via MicroRendu. Any advice welcome.