Distilled water you made with your own distiller is the best. This removes EVERYTHING. Then you can re-mineralize it yourself. Minerals should come primarily from food, not water.
A good quality spring water is 2nd best, but it should be tested. If you had a spring at your house, that could be good but for the purchased spring waters, of consideration is the plastics that the water is sitting in. Plastic is proved to go into the water. Also, inorganic minerals are considered a problem by some.