What about simply filtering your tap water? I don't trust bottled water, especially if it is acidic...acidic water leaches from its environment pulling in toxins from the bottle & the air.
I picked up a bottle of Artisian water the other day from whole foods, called Eternal. It's from New Zealand and claims to be rich in silica. The disolved mineral solids are said to be at 64 ppm. Not cheap either but registers acidic in the low range of 6. Very disappointing and I expected more.