I use a whole house filter (from Home Depot ,<$50) for trapping those nasty sediments and a RO system under the kitchen sink that also feeds water to the fridge for ice cubes (fridge also has a built in filter, but feeding it the RO water makes it last longer and nothing in drinks when the ice melts) love this setup. The newest RO systems do not waste near the amount of water that the older ones do. When I was in Iowa this summer I was amazed how good their tap water is, it's not hard like ours.
