I would still recommend the two US companies I bought from but I prefer Apollon now based on:
a) Apparent competitive price but better build quality, just visually based on their website photos only so could be wrong.
b) Better measurements, superb for the NCx500, that is a fact based on ASR measurements.
c) Willingness to respond to forum questions, even my ridiculous one below, and with informative data:
Note: I made similar request for FFTs based on 5 and 10 kHz test frequency, including to Gene, but I understand they are super busy on other priorities.
Apollon NCx500ST Stereo Amplifier Review | Page 20 | Audio Science Review (ASR) Forum
If Apollon is willing to respond to questions like this, I would imagine they would do the same to their customers.
The example amp linked above, according to Amir was listed for less than $1,200. I do not recall any amp at that price point that can deliver so much "clean" power. Surely I would still take a McIntosh amp rated for half that power, but that would be on money no object, and that I could not hear distortions below 0.01% basis only.