I am finishing my basement and need to know what size of subwoofer is good for me. I have a five room basement but only three rooms will need the sound. One of the rooms is a master bedroom the other a movie theater and the other a game room. I will be watching movies and I want the best experience for it. Also I listen to a lot of dubstep (electronic and dance music with lots of deep bass) I want a sub that can get loud but I don't have to spend extra money for watts tba I will never use. What size and type of subwoofer should I get trays relatively cheap too