I've had pretty good luck with Speakercraft in-walls and in-ceilings. I'm having a new home built and just bought an all-speakercraft system.
FRONT L/R - AIM Cinema Fives
CENTER - AIM LCR Five
REAR L/R - AIM8 Five
ATMOS Overhead - AIM Wide Five
Well, not quite All-Speakercraft because I'm using my B&W CUBE. I haven't had the courage to spend the money on an in-wall Sub