Mutts, I guess I would be biased to reply that the best unit is the Pool Pilot system!

Ben, are you looking for Bromine Tabs or Sodium Bromide? 10,000 lbs??? WOW, that's alot! Used to be Albemarle.com, was the main supplier of sodium bromide in bulk sizes.
For Non-Idodized salt, you can use water softener salt, which is usually non-iodized. You may be able to get Culligan to deliver?