I own Sonus Faber Amati and previously Olympica. I can highly recommend the Amati. There is nothing too big about them, they are only 46” high. You can see them in my audio room in my virtual system. Focal are a very different sounding speaker and would not mesh with the rest of your speakers. Having the same voicing across your system for home theater is important and Focal / Sonus would not mesh easily.
About the amp… depends on how warm you want to go. I have all Audio Research equipment and find it really natural and musical with great midrange bloom… but still detailed. You will loose a lot of detail with MacIntosh. If you only listen to rock this combo is great. Macintosh is the muscle car equivalent in the audio arena… heavy mid-range and bass. One of the well known synergistic combos in high end is Audio Research, Sonus Faber, and Transparent wires, for natural, detailed, musical sound with great midrange bloom.