I think the best under sink will be one that will take less space but gives the best performance. Having said that, what is important is that the filtration system must be NSF-certified or be at least certified by a reputable third-party or a local health department. The under sink system must be capable of filtering up to 99% of the contaminants identified in your drinking water.
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I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.