If you're planning to climb Mount Everest, do an expedition in the Arctic, or just want to stay extra warm with $1000 to spare, you might want to look into purchasing the First Ascent Peak XV snow suit.
This is the ultimate extreme cold weather survival gear that puts every other winter gear to shame. It's a European goose down jacket with three layers, 10 pockets, waterproof rip stop fabric, interior wrist gaiters and many more features that laugh in the face of old man winter. The First Ascent Peak XV is also designed as a sleeping bag, which means if you for some reason fall asleep outside or hit a problem on your way to the top of Everest, you're still safe from the cold. Canada Goose Jackets already cost about $600, so why not shell $400 more to cover yourself from top to bottom?