As far as subs go that are cheap the JL audio 12WO-4's are the best sounding subs for the price. They pound. Ive got the 10's and I love em. And I like to pound. Theyre clean and sound absolutely incredible. Im thinking of upgrading to the 12's. As far as amps go, I know a guy whos pushin 2 12" WO-4 JL subs with a Rockford Fosgate 120.2 given a 2 ohm load and his car rocks hard. Just a thought. Remember, you dont have to go with a lot of power on your subs to get em to sound killer.
