I'm looking into the same thing currently, have my eye on the Spot Trace. It looks somewhat pricey but worth it for the peace of mind and ability to track your bike if it gets stolen. I like the ability for it to be hard wired in so you don't have to worry about batteries going dead. They also can send alerts and have various ways of setting it up to extend battery life. I'm just about to pull the trigger on it and came here to see what other options might be out there that people recommend.