RE: stove
I made my stove a "0" clearance stove, (after i rebuilt the stove to my liking) and made a wood enclosure with cement board all the way around and i believe 3 layers of the cement board benieth it. Actually ther is an inch or two clearance on all sides. I did not make any separate air entrance for it.
My stove works great, right now we are using it every day, and i just fill it half full at night and shut the damper etc down.
For stove pipe i used 6 inch, make the appropriate hole in the roof, and removed insulation around it and added the fireproof stuff back. The stove draws air very well when the door is open. Since i have been using my stove enclosed on 3 sides, we can put normal junk much closer to it, and have never had a bit of trouble with it.
For those who are contemplating using a wood stove, just dont have any carpet close to it...