Newbie needs help. I am in the market for a new subwoofer and I could really use some recommendations. My HT/living room is about 16x16, but, I have vaulted ceilings averaging about 25'. Since this is an apartment, I would prefer a sub that is on the smaller side for space purposes. Ideally, I'd like to spend as close to $1000 as possible, but would not rule out solid options above this limit. My biggest question ... * Will the height of my ceilings degregate the bass response in a big way ??? One last piece of information ... as I do have neighbors on each side of me, I need to be somewhat aware of knocking things off their walls (if you know what I mean). With that said, I would prefer something that does not "rock the house", but still provides good low bass. So, any recommendations ??? I also would love to hear about general speaker experiences from those who have higher/vaulted ceilings in the HT room. Thanks.