i would save your money
its too sophisticated to steal for an amateur and a pro will remove the lock very quickly
insure it -if it goes, it goes - get a new one
but the more you think about it - the more you'll attract it - you'll be fine, so enjoy the ride and park under lights

__________________
2008 E70 4.8i M Sport, Aero Package, Saphire Black on Black
215 21" wheels, Comfort Seats, Active Headrests, Sunroof, Premium Sound, Einsenmann Exhaust
Inbound: ACS Interior, Carbon Roundels and DVD System.

2005 E53 X5 4.8is (donated to wife)
2007 E90 323i M Sports Tourer (retired)
2006 E46 M3 Cabriolet (retired)
2001 E53 X5 4.4i Sports (retired)