Guido,
I try hard to express my preferences while respecting other's points of view. Audio is definitely a preference, but not an absolute. I submit the M525 is great in a smaller system/room, but in my 20' x 26' room, combined with Aerial 7Ts the power and fidelity of the S2 is very obvious.
I submit the Bricasti M1 DAC is great, but knowing what I know now, if someone gave me a choice between having a PS DSD DAC with the JR Continuum S2 or Bricasti M1 DAC with the JR M525, I would take the former of the two. That speaks volumes to how good I think the Continuum S2 is compared to the M525.