They'll work fine together, MA and Yamaha always have. I've been running a Silver 6 and a Silver 8 based AV system with an anthem MRX710, and the system has been sounding great. Plenty of detail, they all gel well (Silver 1 or Silver 2 at rear) and the sub is surprisingly capable!
Though some people say the Focal are on the bright side, I did not find that to be true. They are crisp with great clarity and forward presence, but none to excess based on the in-shop auditions of the Focal 800 series.
I found them very impressive.
Now if you want a bit more laid-back speaker, consider Martin Logan Motion, Bowers-Wilkins, and perhaps Wharfedale.