hello. after doing quite some research i want to ask here what types of systems you know about that actually do what they are meant to be for. the best alarm i could find was some plastic thing for 15 bucks that would activate by vibration but only sound for 15 seconds. i need something better than that. is there anything on the market, or any looks too that might make me feel more relaxed to leave a 1.500 dollar bike somewhere in the city?