Buffalo is the best of bunch, and he will start at least 65-70games IMO.
No way Miller gets worked like a horse if Biron is still there. I doubt Biron will get traded sooner than December and even then Buffalo's GM (I can't remember his name right now) is notorious for trying to demand the world for his players, so he isn't going anywhere anytime soon.
Back on topic, I still think Miller gets the most wins (I'd think at least 35 wins and around 55-60 starts). Montreal has averaged a shade over 40 wins the last two years and I think Huet will get around 30 since Aebischer/Danis will get some playing time, too. Its not even guaranteed Toivonen is the #1 starter in Boston nor how much time Thomas will take from him.