I prefer SS - class A. I am considering the Accuphase A-48 amp which is rated at 45W at 8 ohms, 90 at 4 ohms, 180 at 2 ohms and 360W at 1 ohm. It has a high damping factor of 800. It is their smallest current production separate amp, but it is not small!
My speakers are efficient at 93dB and they have a minimum impedance of 3 ohms, so the A-48 should be a good match.