I just bought these:
No. 6 Clog boots
They're pricey, but worth it, to me. I walk a lot in the city and needed something that was warm with good foot support. They are super duper comfy.
I also have a pair of Uggs that I bought to wear to inauguration in '09. They are also shearling, look like riding boots, zip up with a thick lug sole. Four years later, they look good as new. Great in the snow/cold/rain, with good support. (Regular Uggs provide no support for my high arches.)