My next homebrew investment will be a RO water system, there are many choices out there and im not sure which one would fit my needs, looking for some recommendations..I brew 5-5.5 gallon batches and would like to start brewing at least once a week and my tenent is also a brewer so i would like to allow him to get access to the RO system aswell so looking at needing enough RO water for 2- 5 gallon batches a week