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.
