GAP as a minimum, as people have found out on here and r forum's cars get stolen and yes they do get recovered sometimes. But what if it didnt! OK you will get a decent amount of it back from your insurance company compared to other cars as they hold there money pretty well all this considered, however for the sake of a few hundred quid I have to question peoples sanity when they dont take it on a newish car £20k+ fair enough on a banger.
Tracker yes it will assist the car being recovered much quicker but still doesnt stop the person from stealing it, when I had my car nad revo sps switch I am sure there was somethign on that which would deactivate the ecu so even if they did manange to get there hands on the key they would need the revo sps swtich aswell anyway................