+1 I use pure water club and have been very happy with it. The filters aren't super expensive and it was within my budget range. I have the 100 gallon one, which is only a few dollars more than the next lower one. My water pressure SUCKS! but I can still fill a 5 gallon in roughly 3 hrs, where other units are out of the question because if you have too low pressure they won't work at all.
I have sooo much junk in our water, I have to buy a new filter roughly every 6 months, but for me it's worth it.
I also bastardized some fittings and hooked it up to the shower head in our spare bathroom.