I have a Davis 12X14 with the internal conduit frame. Mine has windows on both side walls and a window on the back wall. This helps with ventilation a lot when its warm. 2 people would be the max for me in this size tent, assuming you are using cots and have a table for food inside, along with the stove.
I have the lighter poly rain fly which i would recommend. I had a vinyl fly previously, and it is really heavy. The poly fly will do everything that you need. My fly extends out to form an awning / porch area, which is nice but not necessary.
I wouldn't get the largest stove available due to size vs tent space, but maybe the 2nd largest. This will provide more nighttime burn time.
Call the guys at Davis and they will walk you through the options. They are awesome to deal with and they will advise you in the right direction, based on your needs.