I am going to be setting up a home theater system in our newly finished basement. Because of our wide open floor plan, I could not use the walls for mounting surround speakers and floor stands would have not been practicle with the room layout. So before drywalling the ceiling I installed 2X4's between the floor joists where I could hang my surrounds. I wired and braced for a 7.1 system just in case but my just go with 5.1 at first. We have 9ft. ceilings, so I have the room and strong enough anchor points for decent size surrounds. So there is my situation and now here is my question. I read a guideline once for which surrounds to mount for different situations, but I can't now locate such a guide. For 'hang from the ceiling' surrounds, with no walls nearby to bounce the sound around, it recommended either dipolar, bipolar or direct radiating speakers. Does anyone know which type of surrounds would be best suit my needs? Thanks in advance for any replies.