If you want something to keep your car from getting stolen, you might look at this (no affiliation). It is extremely difficult to defeat and is the only company I have ever heard make the claim that they have never had a single vehicle stolen. But it has to be installed by one of their guys. I have it on my cobra and GT500.
http://www.ravelco.com/
If you are on the east coast, I will give you the guy to get it from. You wouldn't even know its there after he installs it.
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“There are only three sports: bullfighting, motor racing, and mountaineering; all the rest are merely games.”
www.partskeeper.com
(Less time searching, more time wrenching & driving)