What are you trying to remove from your well water?
You are getting almost everything, with the possible exception of heavy metals and some inorganic chemicals. A final ceramic will get that:
http://www.amazon.com/Doulton-W9381100-Rio2000-BB-System/dp/B009EQMYNC/ref=sr_1_2?ie=UTF8&qid=1377015965&sr=8-2&keywords=rio+2000 That will also get almost everything the UV would kill w/o extra electricity.
You have a very complete system there, if anything overkill. If you truly do need all this, you will need cases of filters as they will plug fairly often. If you need it that bad, I would set it up with two parallel big blue filters for each stage so you can isolate and replace elements without shutting down your water to the house. And pressure gauges to measure drop across each stage to know when to replace or clean.
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