You have 2000 cu ft of space to pressurize for effective bass. Knowing this you need to keep in mind that if you want lots of bass and quality bass then you need to be willing to spend the money to get it.
I don't know your budget but I would look at some of the internet direct companies to get the best bang for your buck. I would suggest considering the following:
SVS PB 1000
Outlaw LFM-1 or maybe the M8
Hsu VTF-2 MK4 or maybe the VTF-1 MK2
If you need to stay below $300 then I would suggest looking at the Dayton Sub 1200 or the 1500. The BIC F12 would also be a option.
If not, dual Dayton SUB-1200s might be a good option. They're $109/ea., shipped.
I've had mine for maybe a year now and the only complaint I have is that it's 'boomy', but you'll be hard pressed to find more output for less.
Klipsch WF-35, WC-24, WB-14
Sony PS3, Xbox 360, Wii U
|Jbl Es250pbk 12 Inch Subwoofer Black , Bic Pl 200 Acoustech Platinum Series Subwoofer , Klipsch Rw 12d 12 Subwoofer Each|