Soft top or hard top? If you have a soft top, I will be selling my Dirty Dog headliner that quiets the soft top quite a bit (makes it quieter than the hard top). Dirty Dog no longer makes these, so I'll give you a great deal on it.
The worst road noise from the rear in a soft top comes from the rear panels. They are right by the passenger ears. Stuff some pillows between the soft top supports and the window and that makes a drastic difference.