These doors have really become popular in our part of the woods, I've actually had the opportunity to work with a local company as a contract designer for a while. I designed over 50 different styles including the ones you see here. I even installed one on my own house. They're great looking, safe, sturdy and very well built. I highly recommend using an iron door for the front of your home. There are over 50 different manufactures selling iron doors, if you live in a major metropolitan area, you'll probably have a supplier in town.
These are just a few: