My feeling is when it comes to these things, you'll never know a good match until you try it. Some great amps have been mentioned here but I'd add one to the list: https://www.audiogon.com/listings/lisb62ag-modwright-kwh-225i-stereo-tube-hybrid-integrated-amp-52620-tube.
For your money, this will likely be hard to beat and it's being sold from the music room so if you don't like it you can return it. This unit will have a beautiful balance of tube pre stage and solid state amplification. I have an LS100 pre and it bested everything else I've had in my system, including ARC, and not by a little.
For what it's worth, I think this is a much better match than a Macintosh. My experience is that Macs match really well with B&W or another somewhat bright speaker; the pairing works out as the smooth Mac cools off the slightly glary highs. Sonus Faber don't have those elevated highs, their much more balanced and the Mac might make them sound mushy.