Matrix is the same as Viper (and Python, Sidewinder etc.) just so you know. The Viper 550ESP is a good alarm and remote starter (this alarm is sold under several DEI brands.) The Clifford Solaris is also nice but a little more money. Installation is everything. Be prepared to spend $500 with good installation (get a battery backup and have everything installed well!) If it were my car I'd go with the Solaris just because the dual point immobilization is much better than DEI's.