Alpine's alarms are pretty good (I have to say that since I bought it) When my alarm is activated, it pages me so if I'm in the building at work and can't hear the siren, I still know the alarms going off. It has very good distinction between what's touching it too. If the wind is going nuts or it hails, it doesn't go off. If somebody leans on the car it chirps until they stop. If they break a window it goes ape$#!+. I replaces the 128 db siren with dual sirens that point in opposite directions. It is horribly loud now, and can be heard in the afterlife.
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The Honkeytonk Monkey
Jewel Green 96se MTX