When you start thinking about which sanitation method to use, you will most likely be overwhelmed with the choices. Of course the goal is to get as organic and healthy as you can get and still maintain a sanitary pool.
Many pools today are leaning toward salt chlorination with the assistance of an ozonator. An ozonator can be added to nearly every system and will make it more efficient. I personally always add an ozonator with a degasser unit to every pool I build.
Other options range from bromine, chlorine, salt, catalytic, enzymes, magnetic, mineral and the list goes on and on… its best for you to check with people you trust in your area and do what feels right for you.