hows it goin, on moday i am goin to get about 500 dollars for my birthday and i want to finally buy my system.. only thing on my truck thts not stock stereo wise is my front speakers they are 6 1/2 fosgates they are nice.. but i need some bass.. i have a 2000 chevy silverado ext cab and the subs must fit under the seats..so idk i might need shallow mounts or i know some kickers can fit..id like to have 12s but i know tens are basically the same..so if you guys could mabey suggest a sub and a amp tht would be great..im already buying a box tht goes under the seat for 100 from sonic electronix also probly need wiring and if i can get a new HU that would be great thanks