I have a 30 quart pot, and it's really too small. If I were able to buy what I wanted, I would get a 40 quart. That seems really big, but you can get a huge foamy head before the hot break and boil overs are messy. A smaller pot means standing guard over it with a spray bottle and not putting in all your wort sometimes, like during a 90 minute boil. If you can find a 36 quart size, that would probably be an ideal size.