Hey guys wanting gets some info and opinions. I'm been thinking of a upgrade in the future. I have been looking at some different type of subs and not sure which brand to go with. What im running now is 2 directed 12" on a orion hcca d5000, and not happy with the sound now. Was a cheap system to throw together, now im looking for crazy stupid loud annoying bass. Also not sure how to make this happen but in my impala my seats do not fold down so im working with just my truck space, which is 41w 37d 18h. There is a baffle in my rear deck. I assume thats was for a factory sub that was not included in my car. So my choices are between 2 rockford T2 12", 2 DD 3512, or 1 Fi N2 12". (not sure the best amp to run this). I also have stock wiring with extra battery in the back. Really do not want to upgrade stock if i have to, although I am open to any suggestions