We will be purchasing a Jotul Nordic that will sit on our hearth and the stove pipe will go from the back up through our existing chimney. One dealer has given us a quote using all flexible uninsulated pipe and the other has given us a quote that has flexible pipe coming out the back and then the top five or six feet is rigid insulated pipe. The price difference is pretty significant in terms of installation. The all flexible cost is $500 less in installation than the rigid cost. Is there any significant reason why we should go with the rigid vs. all flexible liner. It's a reliance liner system if that makes a difference and we're in the Pacific NW.