Hi everyone, I have a 2012 JK sport, and i'm looking to upgrade my stock sound system with the addition of a subwoofer and the replacement of the stock speakers. I am trying to do this while maintaining the factory head unit. Any suggestions? And or pros/cons of keeping the factory head unit? I'm also trying to keep the project to a minimal cost, but still see good results... the standard sound system in my jeep is quite terrible.