Thinking about a new system and not too sure on what to get. Awhile ago I was planning on a large scale system and heard about the DD9515 but I just heard about the BTL's and they seem as though they would be in the same catagory as far as subs go. I want loud, something that sounds decent while doing it but I want loud overall on a scale that best buy and circuit city subs couldnt take me to. Any thoughts?