alarm systems?

[phyre]

I go to school in camden nj ((eek2))

it's in the top of the most dangerous cities..

1. New Orleans
2. Camden, NJ
3. Detroit
4. St. Louis
5. ..

so I definitely want to invest in a great alarm to let me know if anything's going on with my car. I don't really have an idea of the price range for a reliable one or manufacturers either, anyone have any ideas?