@SailorJerry - First, take a deep breath! And congratulations. Remember, the only thing that is *always* true about childbirth is that when it's over, the baby is on the outside instead of the inside!
Different childbirth preparation methods have different philosophies and they are all appropriate for different kinds of people. You and your wife should find out just a little bit about each method you're considering - maybe through library books, websites, or talking to an instructor from that method - and discuss with each other what feels "you." The Bradley method, for instance, involves a lot of lying still and focusing - good for people who have a natural inward focus.
You are probably right about your hospital class. These can have value, especially for couples who do not necessarily plan a natural childbirth, but they don't always give you all the tools you need if natural birth is your goal. Remember that online childbirth education might be an option if you can't find a class that sounds right to you being taught in your area.