Glad to see you are looking into the Dynaudio's. As a dealer myself here in Oklahoma, I think they should be only everyone's short list for audition. They aren't for everyone as nothing is, but they are a first rate company to deal with and their products are phenominal.
You mention the Dynaudio Contour SE, that speaker has long been retired. Just wanted you to be aware and you would be hard-pressed to find a dealer that still has a pair. The Contour S1.4 is the newest model. However, if you can get an audition of the Confidence C1 monitor your search would be over for good. :-) I have these in my own personal system and I can pick from just about anything out there on the market. I chose the C1's.
Regardless, and I don't want this to be a turn-off for you to Dynaudio. The Denon receiver and the Bryston 3B will be somewhat of a weakspot in your system. The Denon being the biggest followed by the Bryston. Certainly nothing wrong with Bryston, we are the Oklahoma dealers for them as well. The 3B model is a bit weak on power imho for the higherend Dynaudio models. The Bryston 4B does a much better job. Bryston makes a tremendous product, however, the 3B just lacks the balls compared to it's siblings. The 3B is still a very good sounding unit don't take me wrong. I just wanted you to be aware it might struggle a wee-bit with the Dyn's.
Let us know how your audition goes.