Of course, happy to expound a bit more. First off congrats on grabbing the Nitsch version!
In my previous experience in using ZMF or Sennheiser headphones with my amp I had a certain expectation going into it, mainly from reading the SBAF thread and talking to a few other owners. Mind you I own other solid state amps which I feel match up better with these two cans, such as the Black Widow 2 (BW) and the Bryston BHA-1. When using both these headphones my main chain is either a tube amp or the BW, so that may very well explain where I am coming from when I tried them with the DSHA-3F.
Anyway, the DSHA-3F sounds as if the music is on a wide horizontal plane, no depth, height, or staging. It also sounds dull, not soft but dull like stifling. Folks talk about the HD650 veil, this amp brought it out in spades for me. This leads to a lack of dynamics, both micro and macro where it comes across as a fuzzy wall of sound.
Now switch up with my Utopia, and all those things mentioned above disappear as if I am listening to a completely different amp.
I know that may have been a bit harsh, I believe in brutal honesty and will not hold back.
If your headphones don't mesh well, I am sure you will have no problem putting it on the open market so not a risk at all. I even thought about buying one, only to compare it against mine, as I bought used and who knows how many hands it has passed through. If you have more specific questions, happy to chat more over PM.