I broke down and bought a pair of Gaerne Midland boots from Atomic-Moto. (Great service, BTW) Great boots. First, I have fairly wide feet and they fit ok. A little snug in the toe box at first, but they are already loosening up after just a few days of riding. Might be a bit of a problem in the cold, because I think they would be too tight on me with thick socks.
Much more support than most adventure style boots, but still able to walk comfortably, if a little stiffly.
Bonus - they look great!