Very interesting, thanks, especially the D8000 comparison. If it is "sonically similar to the Atrium," then it would be a radical departure for ZMF.
Looking over these reviews, there's some understandable but nevertheless divergent accounts of the top end.
- You describe it as "unaccented and unexaggerated."
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@DeweyCH says the "treble may be a little less forward than some would like."
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@jinxy245 remarks that the treble is "not the strong suit of the Atrium to be sure."
I point this out because, for me, an airy and crisp top end would be the main thing that distinguishes a new/novel ZMF tuning. If it is smooth and rounded off, then it would be in keeping with the house sound. I personally would welcome a brighter sounding ZMF headphone, so if the Atrium is leaning that way, then I'm in. If it's as smooth as VC, then probably not for me.