Favorite long winter coat?

I've had a Marmot down parka that comes down to my knees and I absolutely LOVE it. It got me through several winters in Maine and Wyoming. Unfortunately, this winter the zipper broke. I had a tailor replace it, but the zipper he used was really small and broke pretty quickly. I don't really want to try replacing the zipper again, so I'm in the market for a new winter coat. Any suggestions for one that's long, SUPER warm (I run very cold) and won't break the bank? TIA!