I've been auditioning a pair of Adagios powered by a Cary SLI-80 with a local dealer -- fairly early on in the process, but they certainly sounded great to me with the Cary both in Triode (40w) and UL (80w) mode.
The only other direct comparison I can make including the adagios was when we had them hooked up to a higher-end Cary tube amp (can't remember which model, it was more than I wanted to spend so I wasn't really paying attention), and a Jaton Operetta AP2140 (140w@4ohm, 70w@8ohm). Both did an admirable job as far as I could tell, but to be fair, it was a small-ish dedicated listening room, and while I've spent some time with the Adagios there, I can't say I've done any in-depth auditioning or comparisons as of yet.
The only other direct comparison I can make including the adagios was when we had them hooked up to a higher-end Cary tube amp (can't remember which model, it was more than I wanted to spend so I wasn't really paying attention), and a Jaton Operetta AP2140 (140w@4ohm, 70w@8ohm). Both did an admirable job as far as I could tell, but to be fair, it was a small-ish dedicated listening room, and while I've spent some time with the Adagios there, I can't say I've done any in-depth auditioning or comparisons as of yet.