If McIntosh is your reference then you are in for a very pleasant surprise once you hear T+A and Accuphase. Both of these brands offers much superior, engaging sound and build quality, IMHO.
T+A is ultra detailed and neutral whereas Accuphase has slightly more warm (tube like) sound. Having heard both T+A PA 3100 HV and Accuphase E-650 in my system, I can say both of these are superlative choices over any McIntosh amp or Integrated.
I also recommend auditioning Riviera Labs Levante and Hegel H590. Reach out to David Michael Audio who has all of these brands except T+A.
Also check out Circle and SA Labs (Gestalt Audio). No direct experience with these two but I’ve heard high praises and going to audition SA Labs Thunderbird Integrated in next month or so.
It would be helpful to know which Sonus Faber speakers you currently own? I own 96db efficiency speakers, so any of the above recommended components makes an ideal pairing :-)