Probably the most High End DJ Mixer ever made...

Yep, a original Bozak and Urei still the king among most serious DJ's... 

Just remembered that Allen &  Heat made valve mixer, rare this days...

https://www.allen-heath.com/ahproducts/xone-v6/

and the rarest of the all:

https://www.vestax-fans.com/files/v/products/imgdata/image/works/R-3_b.jpg
 
Anyway, will try to get some about the STPVX Phoenix and will update here.

Bozak made a sleeper power amp also

There's a guy here in town named Mark Balma that is building all-tube mixers that look very much like RCA tube studio mixing consoles from the 1950s. They look spectacular!

That’s cool! he have a website? curious to see his work, from the past few years, it’s appearing a lot of designers focusing in develop more high end dj mixers...

He has a site but nothing like this is on it. Too bad you can't post images here!