Best Water Filters & Shopping Tips

How effective are these and what are the differences between water filtered through the tap and boiling water?

I know that boiling kills everything. Some filters claim to remove all chemicals but keep flouride, what is that?
Larry L, what the hell are you on about? I don’t understand a thing you said.

among other things, from your domestic water. When it’s time install a fresh filter, what should be done with the old one? Just how much lead and other toxic substances can potentially accumulate in these filters?

I went to Sears and they had individual reverse-osmosis filters for under your kitchen sink that go for $2-300 that take $20 filters changes every 6 months or else they’ve got a central water whole home filtration system that costs $400 but is self-cleaning, does the whole house, and doesnt need changing for over 10 years. I want to have water be drinkable in the house and don’t mind it just coming from the kitchen. But I could see my family and I flaking on changing the filters. But I’m guessing just one at the sink would taste better than one for the entire house. Here’s the links I’m looking at: http://www.sears.com/shc/s/p_10153_12605_04238556000P?vName=Appliances&cName=Water+Treatment
and
http://www.sears.com/shc/s/p_10153_12605_04238208000P