I wear only one kind ofCOLD weather boot, the Northern Outfitters Expedition Boot. I stand hunt only for whitetails, and my walks are fairly short. This isn't a good boot for really long hikes into the woods, as they are bulky.These boots WILL keep your feet warm down to -60F! You don't want to get them wet though, there not designed for that. But when your dealing with cold, this isn't usually an issue.
I learned about these boots from an article written by Jim Shockey, about keeping warm while huntingin Sask and Alberta. He said they are the warmest boot he's ever worn. Iuse them when I go to Alberta, and I have to agree with him! They were about $200 when I bought mine , they may be a bit cheaper now.