I'm another one plagued by the need for a wide and high forefoot (C width) to accomodate my bunions and hammertoes, and a very narrow heel (something like 5A). At least for women's models, both the Montrail Sabino and AT have far too wide a heel for me. When I tried them, the toe box was fine, but the heel was so loose that the shoe almost fell off!
I have one new and one very slightly used (just started wearing them) pair of the old Montrail Hardrock shoes. Once they are done for, I'll be on a quest for the perfect shoe, which, for me, the 2007 Hardrock (designed before the Columbia Sportswear takeover) is. I'm just thankful that I was able to find (after much searching) the two additional pair! Should you find a new perfect shoe, I strongly recommend stocking up before the manufacturer changes the model!