Russells Sheep Hunter. They make them to fit your foot. You measure your foot, ankle and lower leg in 9 or 10 different places. They make the boot to your measurements and you can get any amount of thinsulate you want. They are pricey, $600 at least but they will fit and you dont have to worry about them raising blisters.
Boots and binos are the 2 things you should NEVER skimp on.