I would also reccommend that you try to stay with the same speaker line as they should sonically match. That being said mounting speakers in the ceiling will notgive you a optimum sound this is why I suggested the kef's as they fold out of the ceiling and retract when not in use. it all depends on the application as to what style of speaker to use. I agree with Audio you need to have everything interfaced.
Hey Jon how is the project? and Business