I only use an Omni TO1 for ALL incoming water when camping and the water always tastes pretty good no matter where we camp.
However, I use the same TO1 filter as a whole house filter at home and it feeds 2 undersink Omni CB3 filters in parallel in the kitchen and the water is VERY SWEET tasting.
Here is a link to the OMNI web site but check other places for better pricing like Amazon, etc!
http://www.omni-water-filters.org/