Just an update.... I asked about a cheap sub a couple of weeks ago, at $150 my choices are limited. I got the Dayton Audio 1200, I must say that it is not bad at all, even for music after it is broken in.
So I got the bug for second one and at the $97.80 sale price I got another one but forgot to use the coupon code

and i used paypal so i cant cancel and reorder. I am hoping it makes a difference. In my big room i had to put the first one in a cubby hole in a corner for output, surprisingly it measures pretty flat but only goes down to 32Hz. if i put it 1/3rd out next to an open wall the output was not as loud, it was down like 6db and didnt have the impact as with the cubby hole placement. i am going to try to put the second one in the corner diagonal from the first one in the back of the room, the first one is in the corner in the front of the room.
I also bought rubber feet to replace the plastic feet as I have hardwood floors and the sub was just crawling around like crazy. it made a big difference in the sound with the rubber feet, and the feet are only 80 cents a piece.
i didnt plan on buying 2 subs, and the way i think 2 DAYTON 1200's will be better than 1 sub of the same price as the 2 Daytons?
so in closing the dayton sub is not really that bad too my ears, and ive had a $1500 and and $700 paradigms in the past.
My systems consist of: (not that you care)

Sharp 60" Le632U
panny blu ray
Denon 391
Jamo s 460 5 piece Home Theater speakers
and the dayton audio 1200 sub soon to be 2 of them