Until now, we have been using the PUR 3-stage faucet mount water filter. We decided to give the less expensive Culligan water filter a try.
For the best price on the Culligan FM-15A Level 3 Faucet Filter - http://goo.gl/Ujd2c
We have been using it for about a month now and it works great. The self-resetting feature to the unfiltered water is a great plus.