Best way to avoid having your yaris stolen?

[gabriel2012]

Right now in PR there have been about 150 toyota yaris vehicles stolen this year. The main reason is people buy this car more than any other vehicle in the island and theres plenty of demand for its airbags/engine/trans.

Right now I have a base power nothing sedan, I always park close to the security guy at work and keep it inside my yard when I'm home. Every time I park I lock the steering wheel and use "The Club". Also, I make sure the red bulb comes on as I walk away from the car.

Is there any good aftermarket alarm that suits the yaris well? I was thinking of a viper but don't know which model to pick, I plan on adding aftermarket power locks to it.