JRDG Concentra MkII vs. other integrated's

For those of you had the chance to experience this wonderful integrated, I'd like to know how you would rate it against other top rated integrateds, including Jeff Rowland's newest offering, the Concerto. Some of the other integrateds that come to mind are the Sim Audio I5, Bryston B100ST, Classe CAP151, McIntosh 6900.
For what it's worth, I recently acquired a Concentra I, and, in the context of my system, found it to be far superior to the Sim I-5 and an earlier Bryston (b60). I am of the opinion that system synergy is THE most important variable, so, if at all possible, audition the component in your home with your associated gear. Finally, I'd say that the Concentra, like many SS amps, is likely to match up best with sources which lean to the warm side.

I purchased the McIntosh MCD205 CD player and the McIntosh MA6900 Integrated amplifier. The overall sound quality is excellent with my Sonus Faber Grand Piano Domus speakers. The extra power plus the tube like quality of the MA6900 make these speakers really stand out. I was very suprised at how good it sounds and so were my friends. I am runnng a balanced Harmonic Technology Pro-Silway III Interconnect from the CD player to the amp. The MA6900 replaced the Bow Wazoo Integrated amp. cheers..
I have a Concentra II and love it. I listened to nearly every other integrated in the price range (including Krell 400, McIntosh 6900, MF Trivista, etc.) and thought the Concentra II was superior in overall sound reproduction. The bass is deep and strong yet tight, the mid's are solid, and the highs are clear, clean and smooth. Its sound is very neutral, unfatiguing, pleasant at high frequencies and high volumes, and always sounds clean. It is more revealing, has better imaging and soundstaging, and overall has a more refined presentation than the others. The Concentra II is superior in terms of musicality, depth of presentation, and "bloom."

I listen mostly to classical and jazz, but with some classic rock and folk thrown in.

If you can find one here, "grab it an growl"!