Baffin Eiger. Get them 1.5- 2 sizes bigger than your reg shoes. They aren't bulky so you won't notice the larger boot. The impact and the endurance look pretty similar in specs if you find them a lot cheaper than the Eiger. I am pretty sure I've got the Eiger (doesn't say on the boot). Rated for -100°C/-148°F
I use them all the time for ice fishing as Well as do a few of my buddies. They all swear by them as well.
I hunted OH last year at the end of November for 2 days straight with no other gadgets to keep the feet warm. Hour before light and all day sits with a high of 16° for the day in a tree stand after a decent walk in. Zero thoughts of cold feet , and I'm a real Nancy when it comes to being cold. Those boot blankets, Or other gadgets would probably put them over the top for warmth, but I haven't used them yet.