As a follow-up on my purchase, I did buy the ASH during the advertised Drop.
I still own the W900 but I decided to sell the SE846 due to how well the ASH perform.
A notable observation worth sharing is the ASH are not the bass-head iem that's stated in their marketing.
The bass is excellent, firm and rich, but in no way overdone. The SE846 is more bass-present than the ASH but that's actually the reason I sold the SE846 and kept the ASH.
The ASH are in the sweet-spot of impedance and I've experienced absolutely no hiss whatsoever. I've played them through an AK380-SS, Hiby R6-Pro, Mojo, Hugo 2, Vega, LG V30, and a multitude of desktop amps... with no aberrant sounds at all.
They match particularly well with the Mjolnir 2 and Liquid Platinum amps.
The ASH are slightly larger than the W900 and fit every bit as well as their brethren.
I've now owned the ASH for 7 months and have no inclination to sell them.
For reference, I find the Chord products are by far my preference of the many DACs I've owned and the Auralic Vega sits in sole 2nd place.