Update: just received & plugged, listened to a first vynil. Well, I did not think my discs were sooo dirty.. heard a lots of crack & pops I don't usually hear. I think it might just be the phono being more sensitive or something (same turntable, removed my CA CP2 phono stage).
But the bass presence.. wow 😳 quite a difference.
Just to be sure it wasn't something related to speakers, I switched to streaming the same album, and no pop / crack, so I 'll clean the disk and try again.
So far, what I notice is I get quite a lot more details at a lower dB than previous amp, which is great!
I was expecting a more obvious sound stage difference, but not so much. There is that nice "smoothness", which I think is the "Marantz sound" that just makes it easier to listen, without attenuation to the actual ... Emotions?
So far, so good, thanks everyone for your suggestions and recommendations!