I lived in a real old apartment with galvanized pipes and pretty nasty tasting water. Used one of these for the 3 years I was there and the water was as good as bottled.

Dave

http://www.amazon.com/Brita-42633-Faucet-Filtration-System/dp/B0000DBIKH/ref=sr_1_9?ie=UTF8&s=home-garden&qid=1223934309&sr=8-9

I had a countertop model from Sunbeam about 9 years ago. The water was good, but there were some design flaws with the machine and it leaked on the counter quite often.

I had a faucet mount filter, I think a PUR, after that. It also did a good job. Now I have one in my fridge.