Why do you need something breathable if you are only hunting in Iowa? Do you do a lot of hiking around?
IMO the overall best thing for you to do is a layering system. This will give you everything you want and I don't think there is any other way to get everything you want and have it very comfortable.
The best stuff I have found for cold weather is Under Armour's Cold Gear products (layering). The best in wind/water is Sitka (and it is somewhat breathable). Gortex products are NOT breatheable, and ALL true 100% waterproof products do not and will not breathe.