I have a 2000 GXE with standard alarm. I want to add a shock sensor to it. I found some people mention that i can install AU-84TP and its one of the cheapest out there - $10. Thing is, I dont want the cheapest. I would prefer to spend a little more money but get quality and/or features. Can anyone who has experience adding a shock sensor to a standard maxima alarm recommend any brands or what to look for?

Tim