Be sure to look at Lathrop and Sons. They carry Hanwags and will use tracings of your own feet to cut their Synergy footbeds to lock your feet into the boots.
I beat my feet with the Asolos I was wearing to the point where I'd be in pain at the 3 mlle mark when carrying any weight. The Trapper Tops from L&S fixed all that. I've actually got the older version of the footbed, not the new Synergy, which are supposed to be a nice improvement.
What he said - in spades! I ordered a pair of La Sportiva's a number of years ago and thought they were fine. Wore them on 2 sheep hunts and on the second trip, I got blisters on both heels. We had to call the plane in early to pick us up because of that. Lottsa money shot for my stupidity. A trip to the foot doc confirmed it - they were at least 1 size too small. I ended up losing the toenail on both large toes as well. Enter Lathrop & Sons & their Han-Wags. I posted my comments here on the board as to what boots everybody liked. Some "wag" comes back with the comment "Bear, we gotta get you a pair of Han-Wag's." don't remember who it was tho. Anyway, I ordered a pair of them and although kind of expensive and a bit of a wait, they fit just fine. There was no problem with fit right out of the box. I haven't taken them on another sheep hunt but they have been up on the slope 2 years running on caribou trips. Up there, it's at least 5 miles off the road if you use a rifle so these puppys have received a workout. It's gonna be a sheep hunt this year too. IMHO, you can't go wrong with the Han-Wags. Good luck.
Bear in Fairbanks