Our Vermont Castings defiant 1910 has reached the end of its days and needs to be replaced after 8 years. Which now leaves us with a decision on what to replace it with. Our house is big and our Montana winters are cold. To top it off, our log home isn't very efficiently insulated. We visited our local dealer and the following stoves were suggested. 1. Another Vermont Castings Defiant 1910. 2. Jotul f500 oslo. 3. Jotul f50 tl Rangeley. 4. Lopi cape cod Our local dealer says the lopi is by far the most efficient. The wife likes the fact that the lopi has the Green Start option and we'd probably get the rear fan as well and she also likes the way it looks. I like options 1 and 3 because they are top loading stoves and I can really pack it full before going to bed, but the wife feels that the lopi has a nice wide opening and if it is as efficient as we were told, the few extra pieces of wood I can get into a stove with a top loader won't make a huge difference. Our home is 4,247 sq feet and three levels. The stove needing replacing is in the main area of the main floor of the house. I have attached a layout of the house. We have a Jotul F602 in one bedroom and a smaller Vermont Castings Defiant 1610 (at least I think that is the model) in our Master Bedroom which is on the top level above the garage. We do have a very old wood burning stove in our basement (make and year unknown) but we currently do not use it as it has a very bad back draft problem. We burn seasoned pine and larch that we cut from our property. While we were not unhappy with The Defiant, as long as it is time to replace it, we would like to replace it with whatever stove is most efficient. The Defiant did a decent job of heating the main parts of the house, but at times the house was chilly and we feel we can do better. We have done a bit of research, but are unable to find some of the information we are looking for. In comparison to what we have been used to, how will the other stoves on our list perform? Will burn times be longer or shorter with any of the above options and which option will best heat the areas that need heating? Are there any side by side comparisons of these stoves?