I understand the appeal of a lovely Pass integrated, but I don’t think it will supply enough power. I drive the P3ESR in my desktop system with 200 wpc. I like large amps, with their lower likelihood of clipping or dynamic compression. To me, they add life to the presentation.
I would suggest a considerably more powerful amp for the M30, especially if you listen at moderate or high levels. Even if you don't share my appreciation of powerful amps in general, I think that 25 wpc is not enough for the M30 to shine.