Here's a nice article written by John Gulland. Annalea's search for the perfect stove brought this to mind:
http://www.motherearthnews.com/modern-homesteading/how-to-choose-a-woodstove-zm0z11zphe.aspx
http://www.motherearthnews.com/modern-homesteading/how-to-choose-a-woodstove-zm0z11zphe.aspx