Steve go out and buy a Reverse Osmosis system. They are easy to install and if you need help I will help you. This is what I do for a living! O course the ones I work on are 6K per day on Submarines that make reactor grade water <.5TDS This system will work for you. Just buy another tank and split it off if you need more water! My under the sink takes my well at 120 TDS and it comes out of the RO at 6 TDS (Total Disolved Solids)
Danny http://www.villagemarine.com/
This is a good system.
http://www.excelwater.com/eng/b2c/our_product_ropg.php

Integrity is like virginity, only you can give it away and only once!