RPM get a low-end burglar alarm---nothin fancy, just do the doors. (If you go wireless, the company will slap it in in 2-3 hours)It's so rare that burglars come in the window that it's statistically insignificant--(and if they DO come in window, first thing the dipsticks do is open the door) It doesn't STOP them from breaking in, but it limits them to about 46 seconds inside (assuming 45 second delay;) The real cost that comes from such things isnt your stereo or tv, it's these effing punks spending HOURS in your house trashing it. They don't know for sure if the cops are coming, but that possibility in the back of their head, and the frightful noise makes em get out of your house