Which one to choose between two 80K$ tube amps?

explains (to some extent anyway)  what/why I heard differently between my SET (class A triode 300b) and my 100 watt push pull( class A/B pentode tubed 6550) amplifiers. Some degree of 5th harmonic distortion presence.

Yes- nearly any amp along those lines will have some of that sound. But of course its more complicated than that- if the amp uses feedback, if its ultralinear or not, if its using triodes and so on. I'm not a fan of interstage transformers but if used in a fully differential topology even then you still get the 3rd harmonic without that pesky 5th showing up as much. You'd think by the application of feedback that you could erase that signature, but in almost any tube amp you simply can't put in enough feedback to pull it off (too many timing constants, especially if transformers are involved).

Shkong,
I would get a pair of Avant-garde Duo Mezzos. Check out the YouTube “Garrard 301 vs Studer”. One of the best recordings on YT.
The system uses the AGs pushed by a Nagra 300B amp.
Since you already have similar silver trannys to the Kondo and a very nice 300B amp with WEs, a super efficient speaker will produce a great system able to fill any room! Don’t think you would need the subs and crossover with the AGs. Simple is always best. Not to knock the Jadis since the Jadis sound may be the ultimate PP tube beauty, but 500lbs and 6 chassis!!

@mglik

Thanks for your recommendation.

I had listened to many Avant-garde speakers at dealer showroom.

They have too much coloration out of horn to my taste.

I am going to get WE vintage horn system.

The problem is they cost 300k$ or so to get a good one( not replica, no recommendation of replica please, I want genuine vintage one).

I had better stop spending money on small gadgets and save money for my dream one.

What particular vintage WE horn system are you looking at?  Are you looking for a complete vintage system, or are you looking to build a system from vintage drivers and horns?  I have heard many systems built from vintage drivers and horns and these can be very nice. 

But, as far as sound quality goes, there is no reason to avoid considering replicas made by G.I.P. Laboratories; they make terrific replicas of Western Electric field coil drivers.  These replicas cost about as much as genuine vintage drivers.  They make a few updated and improved versions of certain Western Electric drivers, but, these are exorbitantly priced.  I have heard the upgraded version of the 597 tweeter and it is very good (the upgraded tweeter sells for $58,000 for a pair).

I have a sort of modern system, based on old school design.  It uses twin 12" woofers with alnico magnets, and pleated paper surrounds in a Onken bass reflex cabinet.  The midrange compression driver is a Western Electric 713b (my favorite driver) feeding a Western Electric KS 120125 horn.  The tweeter is a Fostex bullet-type tweeter.  I am having a crossover designed around Western Electric paper in oil capacitors built for me.  I will probably also upgrade the wiring of the speaker (Audio Note silver wire).