Ok I've been researching some stuff for security. I can get the following

Chain -

10mm chain - $14 per meter
12.5mm chain - 31.60 per meter
size indicates the thickness of the wire of the link. Guy tells me that the only way you will get through 12.5 is with a hacksaw and alot of spare time. 10mm will be only able to be chopped with a very large set of bolt cutters

Locks -
Basic one - $40 stronger than your warehouse variety.
Stronger one - $130 upwards
I'll get some more info on the locks.

GPS trackers
Ok I can do one of our work ones for about $600 each and you can put a simcard in and set it up on a prepay card. you need to wire it to a battery and its not waterproof so maybe put it in your airbox and take it out when you use the bike? tehy use data so only pay a low rate to track your bike if its on the move - about $1 for 5second fixes over a day.
Cheaper one - I can get a really basic one from China through one of our suppliers that is waterproof and will send you a SMS of your bikes location. I'm trying to get more info on it, but they look like they are about $250 so they are more expensive to run if you start moving, but cheaper outlay. Not sure about battery.