I had an alpine in my last car and it doesnt fit into to this new truck, so I'm looking at getting some Rockford Fosgate Punches shallow mount but i can't decide. I want to know what are some good shallow mounts or good subs that would be able to fit under the seat. I am looking at a box from http://caraudiofactory.com/chevy-avalanche-c-22_27_48.html and i want to know what is the best sub to get for my avalanche. thanks