You could always upgrade the alarm and add a reputable after market variant.
A previous post said about alarms being pointless but I disagree. As long as you add the right one
I had my car broken into just before Xmas (bar stewards!!) and they must have really thought it was Xmas as my factory fit alarm had been playing up and they got in and out with no problems.
I have since added a Clifford alarm with dual zone prox and Call guard system.
I opted for the Concept 650 Mk2 with Call guard and Blackjax and digital dual zone proximity sensor.
The prox warns them away. The car texts me when its being tampered with and it also has its own code (only known to me) so even if they get my keys without the correct code the car will shut down. If this did happen all I need to do is text the car a certain code and it will text me back with its exact GPS position
Great protection and piece of mind all round