Intelliguard 750 or higher G5 is the best alarms for Clifford. Why because they have better features in protecting your car. All the Matrix series and Viper 2 way Responder Alarms are just entry level alarms.

http://www.clifford.com/g5/sec/defau...ntelliguard750

Martix alarms are easy to install and easy to bypass. The 750 has a starter and ignition kill. The intelliguard is a little more difficult to install and harder to find a place that will do it for you. There are many features to install for this system. The wireless immobilizer which can cut off your fuel line. Digital tilt sensor to detects even minor lifting or rolling of the vehicle ( in case someone tries to jack up the car.) The basic install cost about $450. The extra features vary between places but around 100 for each feature. If you want a good alarm get a Matrix, if you want a great one get the Intelliguard.

Hope this info helps everyone.