I have horrible well water here in NY. The guy that came to install the purification system described it as one step down from concrete. Even with the system I still don't trust the water for the chams. I buy distilled at the store.
RO is a good method just do some research before you commit, as in most cases it wastes alot more water than it produces. Especially if the water coming into it is cold and the contaminates are high, as it often is with well water. Combined with the basic technology they use to produce many home units for a low cost, you can end up with considerable waste production. I have read figures from 5-65 gallons wasted per 1 gallon produced. Which may or may not be a problem depending on your well size, depth, and how fast it recharges. Also high containment levels will cause you to have to replace the osmotic membranes much more frequently.
Here is a great pdf on RO
http://www.ag.unr.edu/walker/WebPublications/FS-05-08CSREES.pdf