hey, i know what you are going through, it sucks! i had something similar happened to me next to my gf house in west hollywood.
they broke the passenger side front window, stole my prada sunglasses and iphone charger from the glove box and took an ashtray full of cigarette butts, but didn't touch the GPS mounted on the other side...
cops basically told me that they are not even going to look for anyone because there is no point.
have you talked to your insurance yet? what are they planing to do, repair or total?