Both of my boys had the Kamik Rockets last year and they did well. By the end of the season they did let in a little water, but for the most part they stayed dry through the winter.
As campfindit posted, Bogs makes a boot called the McKinley, which is fully waterproof and rated to -30 F. I bought these for my oldest this year and so far they have been great. He has been deer and duck hunting with me a dozen times, even in the swamp and I have not heard any cold or wet feet complaints yet. It looks like Cabela's offers them in purple and right now they are on sale. I would highly recommend these.