Wow, that is awful to look at the gaping hole in the dash. Sorry to hear of your loss. I know I'd be plenty angry. I was when I had some punks take a boombox and some cd'* from my garage. They didn't even damage anything, just walked away with my stuff. Having to look at the mess you got left with, I'd go nuts.
I had an old friend that lost 2 systems for his old truck. Sometimes, if someone you drive by hears a blastin' system, they find ya that way. Simple enough to follow and see where they park the car. That was probably how he lost his first setup, since they broke into his garage to get to the truck and clean it out. Would have had to know it was there somehow. Unfortunately for the owners of nice systems, it'* fairly easy for thieves to find 'em, just follow your ears.
Hope you do OK with your insurance on this deal.