Best SS integrated for Pro Ac Response 3.8


I am now looking for a new SS integrated amp for my Pro Ac Response 3.8 speakers (great, great speakers!!!). I consider Jeff Rowland Concentra II and Gryphon Callisto 2200. Does anyone has any experience with those two amps?
rasloid
I sold Brian the Concentra II, and I have to chime in say that the Concentra II is one of the best amps (and preamps for that matter) I've ever heard!! It ran Sonus Faber Electa Amator II's in my system (maybe similar sound to the Proacs?) and it was fabulous. I still miss it!!
I think that the VAC avatar SE integrated tube amp works well with the Pro Ac´s speakers, like the soundstage they produce.
I have had my Concentra 2 for many years, originally paired with Proac response 2.5 and the sound was heavenly!

It is a wonderful piece, and sounds incredibly musical with any speakers I have used.  Right now paired with rebuilt Quad ESL57, and that combo is hard to beat.  One of these days I'll pull out the Proacs again.

I have owned a first generation Concentra for many years, and have never had the urge to replace it. Fantastic amp.