Ok I am new to all of this car audio stuff but I would like a really hard hit on some subs.... I have replaced my stock speakers with polk audio speakers and they provide alot of base but I keep wanting more..... I want to slide some speakers under my back seats but when I was looking around in best buy to see what I could find they tried to tell me to buy a 12 in. shallow mount sub that costs $299 at 2 ohms.. Could you guys please tell me some good subs to get and a box for them that will work and also a nice amp to run them both... I dont want to spend alot of money so if anyone knows any good value priced subs please let me know.

This is how my back seats are
http://ford.carsbycampbell.com/asset...1NB52708-9.jpg

I was looking at maybe these?
http://www.edesignaudio.com/product_...products_id=30

if you know of something better let me know.