I have the Concord 80 qt pot. Actually, 3 of them. I love them. The steel is thick and they hold up well. I have all sorts of holes drilled in mine for heating elements, recirc/herms, probes, sight glasses. You name it. If it can be stuck on a kettle, I've got it.
If you buy more than one he cuts you some slack on the shipping of the additional units.
A friend of mine has the BC kettles. Each of them are slightly different. The handle on the lids is different in all three and the pot handles are riveted on one and welded on two. Go figure.