Sounds like a great choice. DynAudio speakers are excellent. Particularly if you have control of the room you can really dial them in. There is plenty of room to pull them in from the walls and back. You can easily make a ~6 -7 foot triangle with the speakers and seat, with lots of room behind for a deep soundstage .
I just helped a friend set up a set of full sized Wilson Watt Puppies in a room about that size. They sound great from a whisper to head banging volumes. They are set up along the short wall with the equipment rack off to the side (amp in between ((Audio Research VSi80). Not putting the equipment in between the speakers was important. The speaker wall had tall windows which we covered with cushions behind curtains, deadening the window reflections.