I use an Edgestar 43qt. It's installed on top of the 40% split seat in the rear passenger area.
You should definitely go with the Norcold! Those are basically Engles, which are nicer than my Edgestar. More on par with the ARB style fridges, all though they may not look as snazzy.
I think a 60qt Norcold will fit in the same location I have my Edgestar in.
Anyways, buy a fridge. They're fantastic.