You are not being paranoid at all. Keeping your 'Busa safe is a priority. The Gorilla alarm is alright, but not having a pager is a negative. The Scorpio alarms, including the latest generation have a pager, and that works great when you are on the go. The cable lock is a great deterrent, but like any security device, including alarms, it can be defeated.
I think that the cable lock, anchored to a concrete pillar, and an alarm with a pager would be the bare minimum. The LoJack is a smart option as it will help
find your bike, and possibly the friggin' thieves. BEFORE investing in the LoJack, contact them, AND local and surrounding law enforcement agencies to see if they are part of the recovery program. If they don't have the equipment to read the transponder, it's useless.
A similar option to LoJack are the GPS based locating systems. I actually like the idea of being able to locate my bike 24/7 in real time. If it gets stolen, I can find it, and I have the option of recovering it myself
or calling the police.
The LoJack, and other GPS systems are fee-based. Once you invest in the hardware, you will have to keep making payments for monitoring/subscription fees. I suppose the measure of their worth is your peace of mind. Should your bike ever get stolen, you increased your odds at recovery tremendously. The one variable that makes me pause and reflect is can I recover my bike
before it gets destroyed, parted out, or otherwise abused? Also, after someone violates your bike, would you really want it back, or would you rather call it a loss?
No matter what, it's great that you are taking the security of your 'Busa seriously. One of my riding buddies didn't, and now he's without a 'Busa.
Ride safe!