Yes, yes I know...another SVS thread. I am looking to buy a sub soon. Before I get to the question here is my current setup. Denon 3802, B&W 603's, LCR 600, and 601's. The room is approx 20'W x 15'D x 9'H. It is not a closed room though. About 2/3 of the back is an open staircase going to the second level and also a hallway leading to the kitchen. The system is used for probably 40% movies, 40% x-box games, 20% music. The area that I have picked out for the sub is the front right corner. I have about 40" from the front wall to the side of the couch and 32" from the side wall to flush with the front of the couch. So basically 40" x 32". The front wall has a window that will be right next to the sub. I think the window is about 25" off the ground. The side wall is a solid wall. HAHA probably TMI but I figured that I would try not to leave out any details. On to the questions. I am heavily leaning towards the PB12-ISD/2. Thats the very top of my budget and I want a box not a cylinder. It thought about the PB12-ISD but when looking at the charts it really doesnt seem to offer a whole lot more than the PB10-ISD. Would either of these smaller subs fill my room or is the PB12-ISD/2 the right choice for my room? I usually listen to movies at around -20 to -15 range. I calbrated everything to 0 with the Radio Shack meter and DVE. One last question...If I set my 603's to small and then want to listen to a cd in stereo does the sub still work or do my speakers automatically get switched back to large and no sub? Is 40"x32" enough for the PB12-ISD/2? Sorry for the long post and thanks in advance for your help!