"The problem is I would like to have more of a bass presence especially with the range down to around 25hz. The problem is that I live in a duplex and do not want to blow the neighbors sox off and get evicted. I am looking for a sub that will produce super tight, fast hitting bass to match the speakers."

That is a contradiction. The kind of bass you are looking for WILL blow the neighbor's socks off and you will sooner or later be looking for a new place to live unless you reach an accomodation with them such as what time they will not be around to get annoyed.

Try Parts Express. The Titanic III looks like a winner. If you can spend an hour building a very simple kit, you can save a couple of hundred bucks.

http://www.partsexpress.com/webpage....ge_ID=242#kits