Since we're on this subject, what do you guys think is the best defense system for cars? I've heard good things about aut-exec gas cuts for the ignition, as well as viper systems, but nothing is fool-proof. What do you all think is the most reasonable (cost and effort wise) solution?

p.s. sorry sertag, I can empathize with you. My best friend's H2 was stolen from his condo's garage (most probably because he had custom 23s on it, draws some attention). The worst part is that he thinks it was an inside job (valet guys, who had valet key) and the condo is refusing to show the video surveillance tapes! Infuriating!!