My father in-law is building a 26'x26' room with 12' vaulted ceilings. This is their family/great room. It is completely open and it is a very large square. But it's going to be beautiful. The room will have an 11'x18' rug on top of hardwood floors. The normal furniture will be in there and the windows will be treated with heavy drapes. His current system is an Onkyo receiver (don't know what model), Bose acoustimas speakers and Bose sub. The system sounds pretty good in his current living room but I am sure that once he moves it into the great room he is going to notice a lack of bass. But I could be wrong. He's not big into music but loves movies and TV. What non-tube type subs are there that would match his Bose speakers? I believe that he will not part with those speakers. I have two 25-31CS's but I know these won't fit in with the decor of his room. It would need to be a sub that could fill the room, yet have an elegant look to it and not draw attention to itself. He believes in quality of sound and not quantity. I believe in both. Or, and I'm going out on a limb here, do you think that the little Bose sub will fill the room? Any and all responses are definitely appreciated.