Don't worry about it. Mellow is speaking from experience and as am I. One poster would only go with manufacturer specs and another is willing to give the 7" liner a shot. Both have stated their reasons allowing you to determine which situation you are closer to. Also, I'm firmly in the "don't put too much faith in an ash pan" category. I burn 24/7 in a drafty old house with three stoves. I go through 8-10 cords of wood a winter (hopefully closer to 8 now) and the ash pan is not a main feature I look at. Burn times and heat output come first. Some disagree with that as their needs differ from mine. It is up to as to what you feel is important. My suggestion is; Go with the stove that will keep you warm. Everything else is secondary. Good luck with your purchase. Also, I have burned Pre-EPA smoke dragons, non-cat EPA stove, and Cat EPA stoves. Some hate cat stoves, some love them. If you have dry wood and a good installation you will be fine no matter the technology the stove happens to uses.