This is a great site to read through and see what can be done. There are often many different ways to accomplish the same thing as you are already beginning to see. You also need to know the average gallons of water used per day. Chlorine injection and a softener will take care of most of your problems.
The water rite unit is very similar to a unit being sold by Lancaster. I have installed 7 of them in the past year or so and as of now, they are all working just fine.