So I've decided on the new wood stove (PE Alderlea T5) and contractor to install it. He originally quoted me pricing for Duratech Chimney pipe throughout. I've come to learn that Excel chimney pipe is better. I'm currently at a total price (stove, piping, and installation) of $4190 using Duratech. It would be an additional $310 to use Excel pipe throughout. Is the Excel pipe overkill or worth the money?