sounds like I am better off with the m60's or 80's...is that right? Any recommendations of one over the other?

what do I do with my center channel...should i get the inwall center? since i have a projector screen on the wall i am not going to have a TV stand...or do I get something to prop up the center channel?

If I get a 7.1, should I place some rears on the side wall halfway, or off the ceiling and place them right behind the sofa?

Thanks!