Ultimately this is all you can really do, given there are now people willing to angle grind the locks of a bike in broad daylight with the alarm blaring away then potentially lift it into the back of a van, your job is just to make it take as long as possible compared to the closest comparable bike.
It also depends what kind of tea-leaf you bike is going to attract. If its a uncommon, vaguely high end bit of kit thats likely to be "stolen to order" - its going to be in the back of a van, off to a shipping container where no amount of tracker is going to be able to get a signal off before a skilled thief can disable it. Making you only defense good insurance.
My solution was a £450, 20 year old Honda Deauville NT650 when I was commuting. I didn't even want to be seen on it...
Since I posted that, a friend had two bikes nicked in a matter of days, his solution was a burgundy GSXF 750 with an alarm that talks to you in the campest voice ever. It seems to have worked... so far.