I looked up the replacement parts and I have two options. I can either buy the entire "Switch Assembly" or the much cheaper "Switch Assembly Ignition" from Kawi. Any advice on which direction I should go?
First off, sorry to hear someone tried to steal your Z. I had someone attempt to steal my bike last year...an '05 ZX6R. They tried to use a screwdriver or chisel on my ignition and my rotor lock. They scratched my windshield, broke the ignition, and bent my rotors in the process. Thankfully insurance covered it all.
As far as which part you should go with, the Switch Assembly, or the Switch Assembly Ignition...I have experienced replacing with both options on my previous bike. One year after I bought my bike, the ignition in my bike got stuck and I just replaced the Switch Assembly Ignition that time. In doing so all you are replacing is the part that you put your key into to start the bike, so your bike will end up having two sets of keys. Old key for trunk lock and fuel tank lock, and the new key for the ignition. If you go with the more expensive Switch Assembly, you are likely purchasing the parts to replace the ignition, fuel tank lock, and trunk lock all in one go which would allow you to have just one key for all locks.
Hope that helps.