Hi batman1 , I am a "bit" of a fan a the Belcanto Ref600M's Class-D's ever since I heard them on a pair of Raal 2 ways which were a very benign 6ohm flat load and quite efficient, the BC's sounded great into them. But after that the joy was short lived for them into other speakers that have harder impedance/-phase angle loads.
I looked at your Focal Kanta 2 and they look great, save for the very difficult area around 75hz to 180hz where all the power is needed they need big current to sound their best in this bass area
They give amps loadings of 2.9ohms and up to a staggering -75 negative phase angle, these loads I would not wish on any Class-D, tube or even mosfet.
This sort of loading for an amp to drive without any sweat would be better left up to a good bi-polar (bjt) output stage solid sate amp with big hefty power supply, so it can give big current at will into that load, if you want to get the very best from those speakers in the bass.
As for an amp to suggest, yes with the speakers being 91db you don't need a lot of watts >[email protected] will do, but current is a must a Gryphon Diablo 120 would be my first choice but it's an integrated.
Coda TSX looked at their site and they do use bi-polar output stages so these could be good.
Look for amps that can "double wattage" from 8ohm to 4ohms, and almost double again from 4ohms to 2ohms, this will ensure big current delivery and the amp won't be current starved in that heavy load area.