Several questions. Would really appreciate any and all help. right now I have a 55" samsung flat screen. I plan to continue using it but I am interested in prewiring for a projection. Need help with that. What wires do I need to run for a prewire? hdmi, power??? this is going on a concrete slab. I planned on carpeting but read in another thread where some guys were complaining of not enough bass. I don't think this will be a problem. (def tech super towers and seperate sub) I would still like your input. room size will be 18x23x10. Is there a general formula for determining the number of can lights that is appropriate??? I am assuming solid wood doors to limit vibration??? I had planned on upgrading my front towers and using my older ones as the side surrounds. Other than the eye sore of towers on the floor is there any disadvantage vs wall mounted? I'm sure I will have more questions later, but would appreciate any and all help.