It is best if your front 3 speakers, whether you go bookshelf or inwall/onwall, are at ear level when seated. You don't want sound directed down from the ceiling when the tv/projector screen is in front of you. The Q's are designed to be surround speakers and placed 2-3ft above you or higher. The "side" surrounds go to the "side" of you, and the "rear" surrounds, go behind you, or to the "rear". The Qs can be ceiling mounted with a variety of methods, and angled downward.
Depending on when you call the 800#, normally someone answers, however, it is possible they were on the phone talking to one of us, so just leave your name/number and they will call you back.