I think Head skis factory specs are 1 degree base and degree side. However, from the factory the bevels on skis are not always consistent along the length of the ski as they should be. www.tognar.com
contains a list of common manufacturers bevel settings. As far as I'm aware, only some race stock skis now come with no bevel to allow the racer to set them to their own personal preference. In the straight ski days, zero degree bevels were much more common.
1 degree base and 2 degrees side is a common bevel setting for a lot of recreational skiers in the West. A more conservative approach might be to start with the factory specs making sure that they are in fact a true 1&1. You can always easily change the side bevel to 2 or 3 degrees if you want more edge grip. I maintain a 1 degree base and 3 degree side bevel on most of my skis. In the end, it's all about personal preference.