I have had the good fortune of hearing these Ethers alongside many others, not just in yesterdays headfi meet in CT.
These are my favorite open planar type cans, even against the mighty HE6(!)
They give me the most musically engaging with "meat" alonside its details, where even cymbal hits have more solidness, instead airynes like the HD800.
Plucks of Bass strings have more body and air.
They are unique in their bass quality for open planar because there is no compromise.
No Treble loss (LCD,oppo)
No *edit* subbass excess (HE1k)
No heavy dark bass(abyss)
No airy light bass (HD800)
No unsatisfying bass(HE560)
On an HD800, details pop more easily, but lack the body of presence.
Dynamics hit a bit harder on the HE6, yet lack the body as well as the HE6 sound less energetic & a bit laid back in comparison.
Both HE6 & HD800 can have a larger stage, but both do not give the intensity or energy that the Ether can.
I will still keep my HD800 alongside this Ether for now.
Perfect combo for open cans..
The HE6 also was a good combo, but nothing I would choose over the ether, because of being a bit laid back in comparison.
Soundstage ia less on Ether but still at a level easily matching an HE560, and way more lifelike...
The only competition this can have is:
1- HE6(preference if you have the power requirements)
2- HE-X(unknown yet)
Honestly I could just be happy with these for open cans.