I’ve been working on selecting the audio/video equipment for those house and we’ll be putting in-ceiling speakers in most of the rooms. They’ll mostly be unseen, unless you look up at the ceiling, but in the foyer we couldn’t put speakers in the ceiling because the ceiling is inaccessible without disturbing the woodwork. We could have put in-wall speakers in the foyer but in-wall speakers are more noticeable since you tend to look at walls. I found some truly invisible speakers from Triad. They mount in the drywall and get plastered over with the surrounding drywall so it looks like a normal wall.