As a builder of home stereo speakers and my truck system, remember one thing. The larger the sub, the lower in the frequency range it will go. For nothing but rock and rap (who listens to that crap anyway), a booming sound is fine. But if you are like me and like to hear every range of every musical note, larger is better. IMO, the biggest thing that comtributes to great sound is your amps. This will make or break the sound. Don't get trapped in the power thing these companys rate their amps at. Most of it is hipe.
Personally, I love my two 12" subs. I recommend getting the best amp you can afford to power whatever subs you decide to use. You do get what you pay for, you know??
