One of the best alarms out there, maybe the best IMO is the Clifford AG5. Clifford has an established name in Car Security Market even though it is owned by DEI, Clifford still makes some great stuff. Lots of options and added security. Thats if price isn't a problem. You could also just get an IG650 or 750 and throw on you're own options like wireless immobilizer and digital tilt motion sensor, extra self powered siren, yada yada, ect etc.