Hmmm...with that tall of a chimney I might try without the liner. Maybe even a first year experiment knowing the possible need for a liner in the future. I also agree with the statement above. Go big or go home. You are gonna need firepower. To take a swag at wood consumption - I would guess 5-6 cords for the season in a big EPA stove. (think Englander NC-30 and the like).