Ask Kevin Deal from Upscale Audio. I believe he carries the Opera line. He may even be able to give you a demo if you are local to the L.A. area. I use the Dialogue Two with Vienna Accoustics Baby Beethovens in a 16X32 room and it always has enough juice (91db)Good luck!
Speakers for Dialogue 2
I'm thinking about buying a Dialogue 2. At 38w I'm wary of the output of this amp for my speakers. I have Opera Callas monitors which are 87 db. I suspect that's a liberal rating, because they seem to want a lot of power. Is anyone using their Dialogue 2 with relatively inefficient speakers?