Try BAT 75SE or 150SE, I have my Guarneri Memento driven by 150SE and the sound was to die for. Bold, spacious, airy, focus, and lightening fast. Of course rest of my system are also very good, but I have had very good experiences with BAT 75SE/150SE pairing with Sonus Faber in the past including Amati Homage, Cremona, and Cremona Auditor.