I currently have a single older model RE 12 in the back of my extended cab s10. It's being fed by a JL 500/1. I want to replace it with a single 15 and am looking for some suggestions. I have been doing a lot of research and am looking for everyones inputs. I would like to keep the amp, but would upgrade it if need be. I already have upgraded wiring, alt, battery so power isn't a problem.