Nobs are the backbone of any ork army and these guys are at the top of the food chain, and they certainly need to look the part. I have done many different types of nobs over the years. I was lucky enough to pick up some of these from a friend who didn't need them anymore, and I am already thinking about maybe organising them into a unit to represent some ork eavy armour boys.
I've also been a big fan of the old metal warboss model, which I have managed to include in some of these conversions which, gives them a sense of scale probably one of my most favourite models.