I have a Bel Canto C5i and really enjoy it. I don't have Sonus Faber speakers, but my Golden Ear Triton 7s are similar in terms of sensitivity. The C5i is much more powerful sounding than its 60 watts a channel (8 ohms) would indicate. Power fully doubles at 4 ohms which indicates a good power supply. The sound is very smooth in the highs -- quite tubelike and extended -- and the bass is deep and solid. I have been very pleased with it. My only criticism is the display -- one would think in this modern age of electronics that they could do a little better than the green calculator digit display. However, it is a great amp for the money.