I was just looking at two relativly cheap (>$200) subs to go with some Michaura m55 bookshelves - the Audiosource sw15" (basicaly a 2x2x2' cube) and the Yamaha YST sw300 (twelve inch cone). The room the sub will be in is largish, but I don't want to overpower the bookshelves. Is this not really an issue as long as the sub volume is controlled? I just wondered if there was a way to get more detail for the money given that one of the main selling points for both of these is their movie effects prowess, while I'm using them for music. Recs are welcome. Thanks.