Originally posted by WideBodyEK
any theft deterents do not prevent the theif from stealing your car,...it only delays them from stealing your car
I totally agree with that statement.
You may also want to consider a Low-jack device. Others I know really like it. It's not an alarm, but more of a tracking device for after it's stolen. The only problem is, once you realize it's gone, the car has already been stripped.
Also, what kind of car is it or what are you protecting? If you just have a stock civic, what's the point with going with an expensive alarm? The thief is going to do more damage breaking into it more often then not.