Best tube integrated with Merlin TSM-MMI?

Unison Unico or other hybrids? But what does one give up?

Driving mine with a Cary SLI-80 F1 Signature, All Triode, Zero NFB and love it. I listen to mostly acoustic jazz and chamber classical but female vocals are spooky.

Anybody auditioned the Bel Canto S300i with the Merlin TSM-MMIs?

Bobby has been at shows with the Ars Sonum, Bobby is no fool, other than the OTL route, I prefer, the Ars is one heck a good amp, especially matched with the Merlins. And, though only 30 watts, drives the VSMs about as loud as could take it, not sure how much easier or harder the TSM are to drive.

Very aware of the Ars as a possibility... Not the only possibility, however, so I want to do due diligence.