Alarm for a ragtop?

So what is the best alarm for ragtops? I know someone mentioned proximity sensors and the like, I've also seen some pretty nifty gadgets where you can carry a beeper along with you, and when the alarm is set off, it pages you! Now I just need to buy a handgun :)

Any one have any experience in searching for alarms for them?

Imran
74 Convertible

Look in the thread 'Aftermarket alarm systems' in this forum. There's some discussion of various alarms and such in there.