Best power amp below US $ 20.000,00 ??

The amp I liked best so far was a SET amp based on a single GM70 triode - 30 watts of pure triode magic. I still want something of the shelf.

This is the off-the-shelf version of what you are describing.

Next week I’m gonna try some local ICE based amp and a Nuforce 9s. The next amps that are waiting “in line” are Krell 400 & 700cx, some Classe monos, Plinius SA102, Pathos In-Power, Pass X-600.5, Electrocompaniet AW-400, Mac MC-501. It is gonna take some time though, since I ALWAYS borrow the amps for at least a week for home audition.

In my opinion, you are wasting your time with all of these amps. Not one of them resides on the same sonic planet as what you state as your preferrence: "that amp had everything I was looking for - fine textures, microdynamics, holographic soundstaging, harmonic lushness, natural timbres." Those listed here will not meet your criteria. DeHavilland will. Wavac, Lamm, Joule, etc., but not these.

Best of luck.

The Tom Evans Linear A is another option. Gliderguider loves his. I've not heard it, though this review calls it a home run. I have heard the DeHavilland, several times in fact. It has exactly the qualities you describe in the DIY amp that you heard.

deHavilland looks like toy next to it, although a much better made one !

Considering that you could probably get the $10K deHavilland for several thousand less than retail, the additional $13K to your budget limit should get you what you want without much difficulty. Of course, if you require week-long auditions of each amp, then these long-distance suggestions are a moot point.
Good luck in your search.