Hello Armaegis,
First of all thank you for the shotgun review. Very interesting to read.
We highly value Your feedback. So if I may ask... Any chance to break in the units for 10-20h more? Based on what I read I think this would improve the performance, and your experience, drastically. There are quite few notes which do not seem correct to me (from the "real expected" performance point of view).
Also, I happen to be quite familiar with the NuPrime uDSD. Although it is a great product frankly I have to say that it does not do justice for the HEMs. So testing with different amps should also improve the experience.
I am quite confident that the above changes would improve Your experience with the HEMS. I am very much looking forward of your further impressions.
Jyri