The fact of the matter, my filtered water taste better. I am not really concerned about sickness from water here, Bahamas not sure. We do have a 8-10 gallon an hour water maker, but the water from Taylor Creek here in Fort Pierce is so filthy from Ag runoff I seldom have clean enough water to run it as often as I should for maintance. Where the salt water is clean we will be in like Flynn.
I made the decision for a separate drinking (using shared tanks) water system after I noticed that filters for a pitcher filter was costing over $10 a week. After about a year no complaints. The pathogens being filtered out is an upsize but really was not my reason for the install. I do like the convience of no pitcher, no bottled water and the additional trash bottled water generates. We have been very happy with our drinking water system.
As I reflected earlier, were I to do it again or when or if I replace filters I will go with the charcoal. They get just about everything, fluoride, arsenic, chlorine. As I recall the Big Berky charcoal numbers are over 99% effective.