Hi Matt,
If I wanted a fridge to live in a ute, Trailblazer is about the only one I would consider. They'd survive the zombie apocalypse. Probably a good combination with your shotgun skills.
I wouldn't go for the 5" insulation model, just because it would be super bulky for the amount of fridge space. If your'e that concerned about power usage, you might be better with an AutoFridge. I think Teabag has one of them, and rates it very highly for battery usage.
If it were me, I would go for :
* $1,573: 60L fridge, with the 75mm insulation
* +$510 : MEA Pack - Black capping, 240v, electronic thermostat, standard voltmeter, low voltage indicator
* +$130 : Inside Light
* +$130 : Gas strut
$2,343 . Not cheap, but would last you a lifetime and easily cope with living in the back of a ute. The only other options I'd consider is the checkerplate or Platinum (I like this one) finish, just so it's a bit more scratch-proof. I like the VM special edition range too. And you'd sort of have to get the customised name plate - I mean, how often do you have a chance to have your own name on your fridge? Can't do that to a Waeco.
Ahhh - it's fun spending someone else's money!
Good luck,
Matto