The peanut gallery (me) recommends Pass Labs XA-60.8 amps; these are Class A amps; I base my recommendation on the following:
There is a fella named Jay on YouTube (he has a "channel") and he recently acquired a pair of astounding Magico M6 speakers; connected to it, he's running a Pass XP-32 line stage, and the XA-60.8 amps. In one of the recent introductory videos, I believe a representative from the factory, or the store he bought them from was there to help Jay set up the speakers in his listening room. The Representative appears to have never listened to Pass gear before and he was beyond surprised, in a good way of course. As the saying goes - happy hunting (for amplifiers).