Amp suggestion for Merlins?

Depends on the sound you seek. I bet Gryphon Callisto 2200 would drive them extremely well, but the sound would be different from if driving with Manley. Much more dynamic and transparent, I guess. It is a very rare piece, listed here for $4000 now and I am sure can be had for a little less. Just because everyone uses Manley or the likes doesn't mean that you should. If that Gryphon was within my price range I would get it right away. There are no dealers in the US though if you care about this, so if anything goes wrong you might have to send it to Denmark which is not a big deal. It would sound great with many other speakers too, most of them.

It is well known that Merlin always present their speakers with Joule-Electra power amplifier 80 or 100 watts.
Its not integrated amp so you need separate preamp. If on the budget use passive (TLC, in my opinion, are the best for money see Promethious (spl?)

Ain;t no better amplfiier for merlin then J-E !!!!! Does not exist - ask Bobby from Merlin

Isn't the Ars Sonum integrated what Bobby uses now? At least that is what I thought he had at RMAF this year. If that amp is in your budget it should work quite nicely with the speakers.

Just to wrap up my own question - for several reasons, I ended up purchasing a Rogue Cronus Magnum. No complaints. First tube amp. We'll see what the future holds. Thanks to everyone for their excellent input.