Hmmm, I prefer the CB units which have all of the controls on the master Mic/Handset and the "guts" are remotely mounted elsewhere like under the seat resulting in a more stealth and cleaner installation. For total stealth, simply detach the Mic/Handset master controller and put it in the glove box until CB usage is desired. For additional stealth, use a magnet-style (stick-on) roof antenna that can be simply removed when not in use and stowed in the interior. No visable antenna + no visable radio = no visable break-in.
My favorite remote mount style CB radio is the COBRA #75 WX ST which sells for only $99.95 at www.cbRadiosPlus.com