Typically most folks build their system around the sound of their speakers. Sonus Faber speakers have a unique, natural, and musical sound. They sound particularly good driven with tubes. Do you like the sound of the speakers?
I have Sonus Faber Amati Traditional… I am driving them with Audio Research Reference 160s operated in triode mode, so 60 watts per channel. They will play MUCH louder (without loosing dynamics) than I can stand it.
Hopefully that is helpful.