With regards to staging there's the new Grell Audio OAE1 to contend with....
https://drop.com/talk/137429/the-driver-geometry-of-the-grell-headphones
"With the OAE1 signature we are able to have both a natural sound field and low end bass response due to the acoustic baffle which allows low frequencies to be generated inside the ear cup."
The question is though, how will be the overall sound, the Composer interests me as I sort of have some faith in the designers but at the end of the day it's just another headphone, Grell is pushing for a more out of the head experience, which I totally embrace, but we will see.
If the OBE1 is successful on it's promise of a natural sound field but fails on the tonal end maybe a Grell/AA collaboration?
Ditto.