I think that roofing can be a complicated thing. There are so many different types of materials to choose from for your Austin roofing. Each one has its own benefits, and some are made for special circumstances like extreme weather conditions and the like.
My suggestion for if you aren't sure which roof material to choose is to contact a company that specializes in roofs. They can tell you exactly what options work best for your new roof and your area. This way you don't have to learn the hard way about which material does not work well for your home. I think that it's better to be safe than sorry by getting someone knowledgeable to help with this, and they may be able to install it for you.