RO or RO/DI for drinking water?

[Aquattro]

Just as a comparison, here's some numbers. Potassium. I drink 3l of water a day on average. That amount of my local tap water has 0.6mg of K. The contents of my cooler for food today has over 1600mg of k. The +/- 0.6mg I do or don't get from water is completely insignificant. If I drink RO and it sucks the 0.6mg from my cells, I still have 1600mg K without even considering afternoon snack or dinner.