You really want to try the boots on if at all possible. After getting sized I ended up trying on at least 8 pairs of boots before I found a single pair I could possibly make work.
I ended up in the Atomic Hawx 100w because it was the only one that actually held my heel in. I have been quite happy with it since, it was nice finding a boot that wasn't all pearly white and fluffy liner that would pack out in a week. So add the Hawx series to your consideration list, maybe in a slightly softer flex. They do have the toe flex area which is supposed to give the boots a more natural flex in the foot region, but I've never noticed a major difference.