I haven't heard the M3 or W3 speaker. I have M60s VP100 and QS8s. I was under the impression that it was a nice sounding speaker and it would likely fit my brother just fine. He isn't an audiophile but does know a little about speakers.
The 3 W3s would fit in his room which will be 16x19x10 with a 1 foot drop ceiling for sparkly lights. So essentially 16x19x9. I don't think W22s would fit vertically except below the screen. Since he will have two rows of seats I would prefer to have the speakers above instead of below. I also don't want to get too close to the ceiling or you get reflections.
Since he isn't majorly an audiophile I think a couple m22s and a W150 should be just fine. They would also probably play louder than the 3 W3s without breaking up. I guess I'll just have him go all out and get the QS8s instead of the QS4s also. Hey, it isn't my money
How much space in the wall do you need between studs for the W150? I need to make sure his contractor knows that.