Thanks for the responses.
On the ARC side, so far positives for Classic 60 and VT50, and now the CA50 (integrated) is also on the list, especially since a PM suggested that solid state pre-amp / tube power amp, as a general rule, is not as good a combo as the other way around. I was planning to drive the ARC tube amp with the pre-outs from my Bryston, at least to begin with. The CA50 would solve that problem.
Also appreciate the suggested alternatives to ARC. I'd previously dismissed the MC275 based on reviews that say it is more "old-style" tube sound with loose bass and limited high-end. I've been intrigued by BAT, so have to add VK55SE to my list. Don't know much about the EAR.
I've previously considered some of the new lower cost options such as the PrimaLuna Prologue 1, Cayin and Jolida's. It's good to hear that Buconero117 has positive results paring Cayin and 1sc's.
Keep the recommendations coming - at the risk of making my "short list" a bit long.