I have done a little research on filtration systems and was comfortable going with the Hellenbrand system with the Clack valve, which one of our local companies regularly installs. We were also planning on installing RO, so we weren't as concerned about the added salt to the water after filtration since it would be taken out at the RO faucet anyways. But now I am wondering if we should go with the non salt based systems anyways since it would be less maintenance over the long term (no need to add salt 1-2x/year) and no need to change the resin eventually. But the mechanism of the non salt based systems confuses me. It essentially breaks apart the minerals into components that don't 'stick' and form 'scum', but the minerals are still there in some form. These companies' big marketing thing is that minerals are good for you. What are your thoughts???