So to start off I just want to say I only have a few hundred bucks. I was thinking about going mud flaps before sound improvement, but I realize I have no use for flaps, just looks. So I don't know too much about sound, but I do know the guy who sold me his car had a sub setup, and he left all the wiring in so I could just slap a sub and amp in there. Based on reading other posts, I think I should get a new head unit, but I have bluetooth and usb/aux inputs in the center console. I was wondering if there is anyway I can still hook those up and if the steering wheel bluetooth control will still work with a new receiver along with the in-car mic. If anyone could post a decent one that fits a 2011 premium hatch, please do. I'm looking for advice so anything at all will help!