I would like to avoid chlorine and bromine and would like to purchase a hot tub that has the best built-in sanitizer (knowing that I will still need weekly shock and an ionizer). I have spoken to reps from Jacuzzi, Hot Springs, Dimensions One, and ThermoSpas. They all seem to tell me that their brands have the best system for water purity. I am frustrated at how to get factual information. What is the best brand for water sanitation? Also, is UV better than ozone? Or, which ozonator system is the best? Which ionization cartridge system is the most effective? Which brand has the best recirculation flow rate and which is the most energy efficient? Thank you in advance for any guidance you can provide.