I'm looking to spend about $600 on some sound for my yj. I like to listen to all kinds of music. Any ideas on what to buy? I want a sub or maybe even two. I don't know what types of speakers to buy or what an ohm is or anything. Any help is welcome. I'd like to put speakers on my wheel wells in the back or maybe one of those wedges with the cupholder. And I'd want my sub(s) behind the rear seat. I can build my own box if necessary. Not looking to replace my dash speakers. Unless thats necessary to play loud music with my other speakers. I just want to hear my music loud, no matter what genre I'm listening to.