I had the Consentra I and the II models, they were warm, liquid, forgiving, dynamic, with great bass slam... after I talked to the marketing director at JRDG. (Yes you can call and they will answer the phone and talk to you and not treat you like a no nothing or a simpleton because you have non-technical consumer based questions). The bottom line from him, was for those models ..go balanced. I have'nt heard the Concerto so if the people at JRDG are printing that it doesn't matter if you use single ended or balanced then it must be true.
I have the Dynaudio Special 25's and if you go to most Dynaudio dealers many of the salemen there have Countour S3.4's. I think the JRDG/Dyn combo is superb, because Dyns need not only watts but more importantly volts going through the 1st order cross over. JRDG components put out both with most of the warmth of tubes (I'm gonna get slammed for that!) I think you could do much worse that that combo. I love the ease, freedom from interconnects and lack of component clutter an integrated offers, combined with the sound stage of an exceptional monitor like the Dyns, how can you go wrong? You will get even more out of the set up if you treat your room, I have been using the GIK product (Audiogon member Mypiefi manufactures and sells them, very affordable and effective) to great success.
Have fun. I love this hobby in fact I'm going down stairs now to listen to the new Mark Knoffler/Emmylou Harris album.