@rfc, I've run either a Pass X250.8 or XA30.8 with D9s for ~ 5 years. I think it is great match and sold Magico S1s for the D9s. As already mentioned they are not overly forgiving so I found both Pass models worked great with them with the X model giving a little more detail (and dynamics) and the XA is little more relaxed in the high frequencies with more texture/soundstage depth in the midrange. Even with the Pass gear I found highly detailed DACs like the Topping too forward and settled with R2R NOS DACs or now the very smooth Meitner MA3.
I have no idea how the 9.2 compares but presumably is better; I've never heard the SCM50s but they are on a list of speakers I would like to hear whenever my upgrade time comes...