I went with an ARB 50 several months back so no long term,or rugged conditions usage. If I were to do it again I would go for the next size up,they fill up pretty quickly.The set temp swings more than I would like,I followed the procedure for setting the thermostat,it is supposed to be adjustable in 1* increments,but it jumps 2*. I lined the outside with 1" of styrofoam insulation and reflectix,it is cold to the touch.
One of the things I suggest looking at is how do you want the door to open,like Dometic or ARB.
My original thought was to run it as a freezer to resupply ice for a cooler and use defrosting food for cooling as well.
Now,I think a dual zone that could run in full fridge or full freezer mode, or, dual fridge/freeze would be the most versatile.
Andrew St.Pierre White likes Snowmaster,I don't know if that is promotional or not. Ronny Dahl used to use an ARB,I believe he is using an Engle now,again,I don't know if it is promotional or not. 4WD Action uses Dometic/Waeco,it is promotional.There is a youtube channel called cheap RV living,he uses a Wynter and maybe a Truckfridge.
Having a Danfoss compressor is mentioned by brands that have it.