I have a pair of Sonus Faber Elipsa SE that I drive with a Audio Research Ref 110. This is a really nice combination. Though at this point I would probably recommend either the Ref 150 or Ref 150se. ARC is a great match with Sonus Faber and our owned by the same parent company.
I don't know the rest of your system but synergy is very important. Also keep in mind that the preamp has a bigger impact on the sound then the amp.