Nice. But IMO the rest are catching up. And the Stax 'sound' is not for everyone of course. The 009 is polarising, the 007 more forgiving.
The 009 is very polarizing and as much of a pain to pair up source wise as the hd800 and 007mk1 amp wise. The 007 is more forgiving but kind of a hot mess when I think of all the issues. Like the hd800 it is amp picky and I was not impressed with an SZ3 model with both the GES and 727ii. I was much more impressed with a 71xxx model and mjolnir kgsshv but then Stax guru 3X0 said it was a lackluster amp, any version. I too feel that the kgsshv, while good, has some completion from synergetic $2k hd800 voiced amps let alone the $3k the kgsshv sells for. There is the Carbon but it is said by the builders themselves that it was started to help the 009's treble issues. That leaves the BHSE. Cool as it gets but a ton of money and an extra large footprint. Mjolnir only does one xlr input which is a pain cause I need 3 inputs and 2 rca. Head in Clouds stopped building. Did I say kind of a hot mess? Compared to the amp picky, paint flakey, hard to remove ear pad of the hd800 it is a hot mess. Hd800 has its faults but ultimately for me less faults than the 007 and 009 and I tried a few different versions, amps and sources.
To each his own though and I don't blame people for falling in love with the speed and transparency and 007mk1 bass. Even the best driven (owned Ravenswood and Teton) hd800 can not compete in those areas. Better soundstage though and imaging and detail are on par.
For me it is ironic that Spritzer likes to call allot of other headphones a hot mess. For me his one xlr only input makes both the 007 and 009 a hot mess because while the room my setup is in is decent size the space is really small and getting behind my salamander stand is not fun. I'm also not a fan of running this level of gear using adapters.