Anyone has a reference system where amplification is SS ?

Actually neither, it is paper, screen based, or consultation. One or all are "referred" to when assembling a system.

Repeating the same false assumption after being corrected by others many times is a symptom of illness at worst or of obsession at best  ... Sorry...

I’d say it depends on your definition of what a "Reference System" is.

+1 @mahgister 

Don’t know why OP wants to lose respect and credibility. So unnecessary. 

The concept of reference system is a relative not an absolute ...

It depend of implementation of acoustic, mechanical (vibrations/resonance) and electrical noise floor control among others factors ... It depend not only of each specific parts , tubes or S.S. but it depend of their synergy as perceived in a room designed for the system ...Not a show room ...

Then reducing the concept of reference system to S.S. versus tubes or class D is misunderstanding the great number of factors at play for the experience ...

And by the way psycho-acoustics rule the gear design and experience not the reverse...

Audiophiles or consumers programmed  obsession by marketing  is not knowledge ...