Bibler tents are by far the best tents on the Planet. Bibler was the first tent to withstand 100 mph. winds. They cost but if your life depends on it... go http://www.biblertents.com/2002/
. I got the bivy unit and I've slept at 13,000 and 10,000 in it. And that's just the bare minimums if you like your space. Good luck.