The Culligan OP-1 or the Culligan PIT-1 are both great options.
http://www.waterfilters.net/Culligan-OP-1-Water-Filter-Pitcher_p_0-188.html http://www.waterfilters.net/Culligan-PIT-1-Water-Filter-Pitcher_p_0-1600.html
Water pitchers don't offer the best water filtration that you can get. The best drinking water filtration comes from RO systems such as these but they are more expensive:
http://www.waterfilters.net/Filters/reverse-osmosis/reverse-osmosis.htm
The PuROTwist 3000 is a great RO system:
http://www.waterfilters.net/Good-Water-Warehouse/Reverse-Osmosis/systems/PuROTwist-3000.htm
Under sink systems are also better than water pitchers but not as good as RO systems:
http://www.waterfilters.net/culligan/undersink/housings/SY-2650.htm
Thank you,
WaterFilters.NET