Purifying Water

I bought a water purifier to purify our tap water for drinking.  It's in pitcher form but I want one that is permanently attached to the sink itself.  What do you prefer?

Thankfully, our city doesn't put fluoride in our water so I don't need to worry about removing that but my trust in government protecting my kids' health - not so much. I'd rather make sure I am doing everything I know to protect my family rather than depend on an organization that has special interests groups breathing down its neck to do it.