I've had many a set of Dynaudios including the C4s. I do think of Dynaudio house sound as a bit on the mellow side but in the best possible way. I think Kef is that way too a little bit but more of a dry sound. If you are looking for very sharp treble I don't think Dynaudio is the way but they are very musical and great speakers. I've owned maybe 10 or so Dynaudio models and they were all good. They do need a great amp to sound good though maybe more so than other speakers.
Dynaudio resolution
Years ago I bought a pair of dynaudio audience 80's to replace my kef r105/3's and while I was more than a little impressed with the bass I couldn't help but notice mid/tweeter resolution was lacking. That was many moons ago(kef's are long gone). I returned the A80 and got the kef's refoamed. now i'm buying and trying full range speakers on the 2nd hand market and remember how great the bass was from those dyn's. Is the esotar tweeter a hi rez tweeter? Do current models have the top to bottom resolution of the other top brands? and how sensitive are they to partnering components? say price range of a used pair of C4's. Tks Steve