@hifipassion I too received the ONIX transport several days ago, buying from Forte at the 10% off. Do not have extensive time with it yet. But you mentioned it is quiet. At spin up, and lasting for a few seconds, do you not hear a mechanical noise (not just whirring)? Mine does, but it only lasts several seconds.
I am running it into a Venus II-12th and found the optimal I2S pinout code to be mode 3 on the ONIX and mode 7 on the Denafrips (although modes 3 and 5 were, by the manuals, the matching ones--I got right channel background popping or static using those).
The "manual" by the way is on the French website "Audiophonics".
I like that this is a top loader and looks attractive. I am not sure the sound is LEAPS above a higher end TEAC SACD player I have in a different system, or even the Yamaha in this system.