Hi all. We're converting our never-used dining room into a parlor/den, and plan on putting in in-wall speakers. (If there's a sound difference, the Boss would probably accept on walls). The system is to be stereo only...no TV planned. I've sadly become a total Luddite with regards to electronics.

So, the questions:

1 Are M3s still the go-to standalone speaker i.e. no sub, for in or on wall installation?
2 Are there important performance differences between the on wall and in wall models? We listen to everything...rock, jazz, classical, opera
3 How does AirPlay work? Can I stream content from an iPod or iPad, or does Airplay stream directly from the cloud? Does my desktop need to be on?