If you don't want to spend a lot of money, Superdry makes a decent quality parka. Get one with a faux fur hood and you'll be set.

Otherwise, LL Bean is probably the best quality for your dollar. The coat will last a lifetime.

You will also want a wool peacoat, which you can get anywhere. For when it's too warm for a parka and too cold for much else. Great for late fall as well. And perfect for formal functions, since it's still stylish. You will wear it more often than your standard winter jacket.