beags : <font color='#000000'>Rick. I feel your pain when it comes to buying new stuff.
I received as a gift(very lucky) a Dayton loudspeaker kit. It came with a 10"(you can also get a 12"

Titanic sub. It comes with the case and amplifier. It cost somewhere in the area of 300.00. My friend and I built the entire sub unit in under 2 hours.
I am by no means an audio expert so you can take or leave this advice. Personally, after listening to many different subwoofers in peoples houses as well as in "home theater rooms" in different audio stores. I am extremely pleased with this subwoofer.
There are many manual adjustments so that I can vibrate walls(I knocked my Christmas tree over three times)(Lord of the Rings - when the cave troll comes after them sounds as if it is in the room with you) or I can tone it down to a much more subtle level(wife likeable). I have recieved many "Where did you get that!" inquiries since I started using it.
For the amount that my friend paid for it and the response/sound that I get from it(comparable with many high end subs that I have listened to) I am very satisfied with it.
Here is the web site
http://www.acoustic-visions.com/titanickits.htm
Best of luck Josh</font>