For whats its worth John, I'd spend $600 on a second hand Engel or ARB fridge. I paid $600 for my ARB 47L fridge, and it came with an insulated transit bag. My 75L Engel I bought second hand, but it was brand new, the box had not even been opened. I managed to score this for about $500 under the going shop price. I did have a 29L Engel too which I sold for $400, and that was 20 years old!
I did see on FB a Kings fridge that caught fire, I can't comment on the other two. Waeco's are supposed to be quite good too.
Current draw is an important factor too, and their specs on how cold it can go below ambient temps etc etc. You really want an insulated cover for these things too, it get bloody hot in the back of these Patrols. I've blacked out the side windows and will be retinting the two rears to as dark as possible just to help.