G'day,

it's been a while since my GQ got stolen and I finally bought a new one. Why change when you're on a winner? I'll introduce her once she's in my driveway.

Now I don't want my new rig to suffer the same fate as my last one. My mechanic told me that he knows of a number of GQs which disappeared in recent months. Not a good sign. What have people done to theft-proof their cars?
I was thinking GPS tracker (~$150 + $70 for 1-year Telstra prepaid sim) but that's for more urban areas and only to get the car back once it got stolen.
The other option which comes to mind are different kill-switches. Needs to be hidden enough but not too hard to access for myself. It also must not break and disable my ride somewhere outback.

Any ideas?