The well water at my house is pretty awful to drink. No bacteria or anything like that.
I have seen suggestions that if you have no nasty bad stuff in the water to just use two carbon filters instead of reverse osmosis. The claim is that most of the cleaning of the water in an R/O system is done by the pre and post carbon filters anyhow. Is anyone doing just carbon filters for drinking water? Otherwise, I am looking at a Kinetico K5 system because it has technology that mitigates a lot of the issues with R/O systems. Nobody seems to have issues with the K5 other than the high cost.