Black95Accord

Alright. About 5 days ago i had to leave my car over night at Tire Barn and i dont think they locked the car. It was broken into and whoever did it did not take anything but my 5 channel Crossfire Amp! The did not take my 200 dollar radar detector, head unit, or subwoofers. The amp was mounted on the back of my subs. so its not like it was just out in the open. They also took off and stole the panel that goes underneath my steering wheel all the way down to the pedals. Why would they do that? Tire Barn is giving me $700 to replace the amp. I am looking at the Ultra Start 660 Alarm system. If you know nething about this alarm fill me in. Is it worth the money?