after a lot of thought about the space I have, and the budget, I opted for a 3 kilo. It has all the features I want, and I can afford it. Dan said that they have consistently roasted loads up to 8#. I really can't roast more than 4# on my 2 k. now. even if I can't roast as much as Dan says, I still will be able to roast a fair bit more than I can now. one of the things I really wanted was gas and air control. this has that. I also wanted a roaster that I could get parts for easily and that was really easy to keep clean, and I think that is true of these roasters. from the specs, it sounds like a bigger roaster than a 3K. it weighs 400+ lbs, and it is a floor model. I have gotten a lot of help from them even before I decided to buy the roaster. I'm impressed with the roasters exchange website and the stuff they work on too.