Alright, that's a good budget to work with. That's what im gonna spend the the Clifford Concept 600, it has many of the features the AG4 has, and is a very competent alarm system givin it's installed right. That has alot to do with it, the siren has to be hidden, same for the brain, and the wiring should look like it's stock and not stand out like a sore thumb, all of these things contribute to the alarms effectiveness. I am paying $650 installed for this alarm, I'm also gonna add a 130db siren in the interior as well as a battery back up:thumbup: