I agree with Mr. Cifuentes ...

I agree with Mr. Cifuentes that single pass RO is likely to meet uniformity, sanitary, and taste standards far more easily than anything else, but with the caveat that you must invest in upstream pre-treatment to protect the membranes, and condition the incoming water to usable quality, or you will have variable results with your systems.  Make sure not to over-design the capacity of the RO system by too much, so that it should never make short hours runs, but should be running 24 hours, seven days each week.