First, thank you all for your answers and suggestions.
Some of them request or need more information from my side, here it is:
My DAC: Lampizator Golden Atlantic: it is a previous version of the present Atlantic TRP, made with better components than its equivalent Atlantic. I love its sound and I think it does not convert DSD to PCM.
My DAC playing DSD files: I made several comparisons with files downloaded from Native DSD, and I prefer always the DSD file to the PCM file. It does not matter the recording was made in PCM or in DSD or in “Pure” DSD.
My small problem and why I have put this demand for help: my ripped SACDs (all of them old Classical recordings of great and big orchestras) sound worse when played with my system: server - Roon app - Lampizator DAC than when played with an Esoteric K-03XDse (owned by a friend) Besides, ripping the SACDs is a non easy task for me.
So for the time being and from the answers, I see three options:
1) Go with Esoteric PLAYERS, but price of the lowest one K-05xd is too high
2) Go with the Onyx Zenith XST20 TRANSPORT, whose specs say it delivers “DSD64 via DoP or D2P via Optical / Coaxial / BNC / AES” to any DAC: that would be my case as my DAC has not I2S input.
But I do not have any reference from this manufacturer owned by Shanling, and no dealer in my zone has this equipment.
3) Keep my system as it is … but all of you know that this is not a pleasant thing for any of us.
Any other idea or recommendation for my three options?