Thanks for the reply, guys.
I have the Air 4's connected directly from my Opp 95.
I live in a small apartment so I can't rattle the walls but I don't watch blockbuster movies anyways.
Unfortunately, my budget is only around $200.00 so I'm considering the Monoprice 12's.
But if there's a more musical sub out there for around $200.00 I'd like to know.