BrokeSkoolBoi
100+ Head-Fier
you are looking for an open $500 headphone, then buy the "Drop" Koss ESP/95X.
Its the best sounding Sennheiser Electro-Static headphone that they never actually made, so Koss did it instead.
its really good.
If you are looking for "i just want 4 headphones and im happy", then get the Koss, get the Audeze LCD-X, get the Hifiman Edition X, and the Amiron wireless.
These all sound different, and they all sound very good.
I'm not sure why you quoted my post, however I'm glad to read your impressions on the koss which I've been avoiding in favor of another planar for some reason.
I'm curious why you don't immediately suggest the Era-1 even after admitting that you very much enjoyed it a few months ago.
Now I must put in a vote for the Cavalli tube hybrid sold on Massdrop (at a measly $250) alongside an individual LPS powering it is quite nice. Once you use it with your own power supply tube rolling is more pronounced and you can enjoy a smoother/euphoric tube like an Amperex if you aren't looking for clarity. The only downside is that this Amp is not balanced despite having an XLR output.