As I said to Moritz, I have changed a little (more than a little in fact), some days after I tried it.
This "too simple" look, that you call rightly "lack of charisma" is in fact a kind of discretion I learned to appreciate.
I thought it was not to my taste, a little boring, but now I tend to understand it differently and would even consider it over the 5139 or 5140 (not the 3940 though).
The little things I would change are the registers' gold frames I would have prefered less visible.
Thanks for your interesting input Kari.
Cheers, Mark