[s-cars] Alarm systems

[TM]

Due to a recent vandalism incident involving my car, I've
decided to get an aftermarket alarm system, w/ dual stage
shock sensor, glass breakage sensor, remote keyless entry,
etc.

I know you s-car guys already have keyless entry, but has anyone
here actually gotten an aftermarket system?

I'll probably upgrade to the telematics system w/ GPS tracking
and break-in notification when it becomes available.

Please email me off-list, if you like, I'd really like to talk
to some people who've BTDT.

Taka