as far as a security system goes, I am doing the install myself. I work at Circuit City doing installation so I am very familiar with everything offered by Viper and the other security system options. I had -EVERYTHING- imaginable except the location device on my Tegs alarm system. Im definately going to add lojack to my next car though.
I am just throwing out other options so I can come up with something to deter tow trucks from stealing my car.