I went for a multi-layer security approach with my two Radrovers:
- Boomerang GPS cellular tracker, $200+$50 for 1yr of Verizon coverage. Use smart-phone to arm/unarm and track bike, it has 110db alarm if bike is moved. You get immediate email notification if your bike is moved.
- Xena 18mm U-bar XSU-310, $95-$100, Amazon, this lock can be cheaper than the name brands on eBay with the same thickness and used to secure construction equipment. you have to cut it twice if you need to remove the lock because the U-bar doesn't swing with one cut.
- Xena 14mm XC-14 5 foot chain $85-$95, Amazon, use this to secure the U-bar and chain together
I'm covered automatically with my USAA homeowner's insurance at $500 per incident home or away. I'm not covered for any maintenance issues, still have 7 months left on 1 yr warranty.
I also signed up with my local police department bike registration web-based database and online bike registry sites like:
National Bike Registry:
https://www.nationalbikeregistry.com/index.html
Bike Index:
https://bikeindex.org/
Project529:
https://project529.com/garage/users/sign_in
Bike registry:
http://bikeregistry.com/
I sometimes use the lock combo to secure both bikes together if the wife and I are out together. I do have a lighter security 12 foot cable+lock because it is very light and easier to use. I use the cable when we need to make a quick stop and the bike is usually in my line of sight (still have the Boomerang also). I use the heavy duty stuff mostly when the bikes are on the vehicle rack or street bike rack unattended for a while.