Well, I own an ARC Reference 6SE, and before a REF5se. In the past I have used Pass amps, like most recently the Pass 350. The moment I put a ARC Reference 160s and 160m mono locks I knew that was the end of my long relationship with solid state amps. Absolutely magical. I went from 45 minute listening sessions to three hour sessions.
In fact I then swapped my DAC for a ARC Reference 9CD SE DAC and the synergy became really obvious. While very detailed the overall musicality and natural character became even greater.
I have not heard the REF 10… however the LS 28SE and Ref 5 - 6SE clearly share the same sound signature, so I am sure this will be a nearly identical match.
Wattage matters a lot with solid state and is no where nearly as important with tube gear. 350 wpc sounded about right with my Sonus Faber Amati…~ 90db sensitivity… I am running them now with my Ref 160 in triode mode with 70wpc… more than enough power at any volume.