Carl, that's quite the set up. I assume that you're describing a set up for daily use, and not purely for storage of personal emergency water? With a 5,000 gallon tank or two uphill from your house, I'm not sure there's much need for a 50 gallon water heater-type storage inside the house.

Whenever people mention the water heater type set up, which keeps circulating water through the tank to keep it "fresh," I also try to bring up the point, like Mark, that your supply could be contaminated by the time anyone gets word out that the water supply could be contaminated. The recent West Virginia chemical spill is a recent example. Who knows how much of the chemical people had been drinking before it became noticeable or the word went out to not drink it? But since you're on a well, you're probably better insulated from that kind of event.