winter boots?

looking for new winter boots, always used Keen Revel III and i liked them, but now i’m looking for a taller dedicated winter boot rather than a winter-hiking hybrid.

my gf just got a pair of Helly Hansen Bivy 2.0 and she likes them, i’m considering a pair, but i wondering what you all recommend? i know Baffins is another optimal brand, but the only talk Baffins at Marks seem just too bulky to drive in