Street Rodder or Rod and Custom, forgot which, has a Lojack type device they are pushing this month. Also. Lojack is probably the best. Regardless, if a thief wants your car, he will get it - just don't make it easy. I have a battery disconnect, which, if you can find the switch, you can then drive the car away. Wont stop that thief, but at least will slow him down to the point that he might just choose another guys car - unless he is using a roll back.