Bravo is the manufacturer I used. I spent many years researching and found them to be one of the best if not the best. I have4 seasons on the tent without a problem.
I added extra D rings to the back at mid wall height. That way if I was set up in very windy areas it kept the walls from flapping. I also opted for a snow slide. It allows the snow to slide off easily and also makes the tent heat a little easier. Brass zippers work best. They do not corrode or break. Use a little wax on them to keep them slidding smooth. I set the tent up intitially and sprayed it with water so the canvas would shrink and close up the thread holes. This was recommended by the manufacturer. I have spent two days in a row where it rained solid and the tent did not leak.
http://www.bravomfg.com/