I did a full audio upgrade. I originally wanted just front and sound bar, but quickly realized I also needed some more bass. Very happy with my full upgrade, but I did full amp and sub.
I strongly recommend getting a small sub just for some bass fill in.
2012 JKU Sport Silver - Max Tow, Trac-Lok LSD, Auto, Sport S package, Hardtop.
MODS: See garage, bunch of fun stuff underway.