My Sympathy for your loss Adam!
I will never forget that feeling of confusion and disbelief when the same happened to me in the centre of Tel Aviv at lunch time.
I parked the bike on the side walk with Kryptonoite U lock thru the front wheel and fork, steering head locked AND Alarm activated for a short lunch of 20 min.
When I came back it was gone! 4 scum bags lifted the bike (GSX750EF) onto a ute and explained to 3 ladies who witnessed the event, that they were the owners and taking it for repair....
The bike was used later that day for a bank robbery and dumped behind an apartment block at night.
It was found the next morning by an israeli rock star who volunteers with police duties.
The damage was an ignition barrel and fuel cap and some re-connecting of jumped wires.
despite the additional weight (4 kg) since that event, I ALWAYS carry and USE a 6 meter super thick, steel reinforced security cable and extra heavy duty lock to go from front wheel > thru centre stand > to a fixed post. I use this if I need to walk away from the bike and cannot see it, no matter if 5 min or the whole day...takes 2 min to set up and 2 min to put away.
ANY bike can be taken if wanted badly enough, but for thieves it is a matter of utilizing time efficiently... it is a deterrent only, but the idea is to allow the scum to "move on to an easier target"
I hope you have a quick and positive outcome !