Viper Security System/Tilt sensor/Proximity sensor

kfull

So I am planning on getting the viper 5204 security system( security w/ remote start). In addition I think I am going to get the proximity sensor and the tilt sensor - these 2 additions are mostly to stop people stealing my rims/tires. Do you guys think the proximity sensor and tilt sensor are overkill? Or should I only get one of them? Also does anyone know if the sensitivity on the proximity sensor is adjustable? I'm feeling like now I want to get the backup battery system too...I guess I am just paranoid Any advice from someone with a viper system would be great