I would concentrate on your 'primary' downstairs wood stove first. Get that installed, get it running and see what you think. Working on 2 stove installs would stress me out.
Good luck..welcome
Primary is upstairs. What brand of pipe should I go with? Went to ventingpipe.com, who gave me the support numbers for Duravent and MetalBest. Lowe's has a brand called Supervent, but I'm not sure of the quality. I don't need top of the line, but I don't want crap, either. Also, the roof I'm going through is a 12/12 pitch, but due to settling, it's off by a few degrees. How much is this going to screw with the thimble, and can you get shims or something to offset this issue?