I've been researching speakers for my home theater. At first I was looking at the Studio series but came to the conclusion that they are a little out of my price range since I'm at the starting point of building the system. At first I thought a bookshelf would do the job. But after reading many posts I realize I may not be happy with the limited range or the capacity to fill the room. I want to start with the two towers, then purchase the center channel. I'm looking at the Monitor 7,9 or 11. The Monitor 5 bookshelf looks to have the same diameter speakers as the 7, so I'm not sure what the sound difference would be. I do like the narrowness of the 7 and 11 for my living room arrangement of 11" X 22". I would like to know + or - of the three, if there is any.