Both Doemtic and Norcold make some very nice high effiency compressor fridges, Like 50 watts or less running (Compares with some of the lights in this rig).
I did not know Atwood had an entry in the field.. But I also thought Atwood and Dometic were... shall we say the same company or at least divisions of same company.
I know there are many here who are scared of absorption cooling, My major complaint is that it takes 350 watts or the propane equivlant to do a 50 watt job,,,, But then standard residential fridges are goign to suck between 100 and 500 watts to do that same job too.