On the security front, I am fitting one of the Pay As You Go trackers, so under normal circumstances no need to pay the monthly subscription, just pay it as and when you need it. I am sure thieves will look for one, but a well hidden one might just get your car back quickly and in one piece.
You could of course install two, making one easier to find than the second and making the thief think there is only one.
Peter
That's a good idea, my main thought at the moment though is to provide some visual deterrent to theft which would provide some protection. Retrieval in worst case is another issue!