Thank you,
@JaZZ, for this great post. A good example of diligently sharing experience, without ideological distraction and offence. Here, we are on the field of personal impressions and delight, based on the principles of "everybody's got his own ears only, and his brains behind the ears"; on that field, one has to be careful and respectful. Your post for sure deserves a thumbs-up; that's what fora like this are for.
As I wrote above, I had formed my own opinion by carefully auditioning the H2 >> V281 >> HD800S chain, with and without the V281. I had arrived at the conclusion "yes, I want the V281 in it". Maybe that is an "if it sounds good, it is good", maybe that is a case of wishful thinking, maybe it is self-deception. But anyway, I have my V281 for more than a year now and continue to be happy. It was only recently that I found an article on the web by
@twister6 published half a year ago (i.e. long after my findings!), who presents much better arguments in favor of externally amping the H2 in certain use cases than I can do. twister6 is on Head-Fi, and his article is here:
https://twister6.com/2019/05/13/adding-an-amp-to-chord-hugo2-good-or-bad/.
Unfortunately, I cannot judge on the basis of his arguing, i.e. his statements on the H2 electronic design: A DAC without an actual AMP. But SQ findings are in line: I used the word "authority", and this just matches twister6's findings with "heavy-weight" champion headphones and the H2.
Cheers, and thanks again for your input and attitude!