Will you help me choose my home water purification plan?

A while back I was using a Reverse Osmosis system to make purified water. The water was so free of contamination, I felt more comfortable adding minerals to it. If not I could feel it picking up the minerals inside me. Maybe that’s psychological. Anyway, it was going well, but I just felt a bit unsure of the RO quality compared to spring water.

So, I started drinking store bought spring water again. Now I would like to pick back up and make my own fresh water supply. And I’d love your advice. Expensive installed hardware is not going to do the trick.

I’d prefer something that I can take along with me if I move, and that produces high quality safe water, comparable or better to spring water like Ozarka.

Thank you for your help.