After visiting some homeless camps recently in a wind storm, I can tell you that a dome shaped tent with strong poles thats not too high and has few flat sides, will flap less and be less drafty. A drafty flaping tent is much "colder" than a quiet tent. I would shoot for a tent just large enough to suit your needs (not too tall) and then you may want to use additional ropes to tie out the windward side of the tent.
Jim