I've got a pretty open floor plan in my house with no dedicated HT room. My living room is essentially one big room that spills over into the kitchen and has a formal dining area (part of the big room) in the back. If I had to guess, it's probably about 3500 ft3 or so. 28' on longest side by 12' wide and on the shorter side it's about 15'. In any case - I've got an older Sony 8" sub that doesn't put off much sound. I don't get to play my movies or music very loud most of the time, but when I do I want to be able to feel it. Now to the bad part, I'd like to see what I can get for ~400 shipped. I've got JBL's all around except the sub for now. I had considered the JBL E250 but recently got turned on to the SVS PB10-ISD and I have found a Velodyne sub in my range as well. I can get the JBL for much less than my limit though. Also, it's not horribly important that I have the ability to rattle the pictures off the wall, I just want to have a much more full sound and to be able to feel it a little more than my current setup. Can anyone suggest something or comment on the two I've noted? Thanks!