T.N.
Hi A., we have a whole house system install by Culligan, including a reverse osmosis system for all drinking/cooking water. It was expensive (about $3000 5 years ago), but it so dramatically improved our life it was WELL worth (and was a big re-sale factor when we sold the house as well).
And very convienent too. They delivered the salt monthly, and put it in for you if you are home. They also came and changed all filters on a schedule for no charge except the cost of the filter.
They also offer JUST an under the sink reverse osmosis system that was much less expensive, and provided similar services for just that as well.
Might be worth a phone call to have them come out and talk to them about it.
:)
(The reverse osmosis is the only thing I know of that gets out EVERYTHING!)