It sounds like you need a thorough system to remove sediment, iron, sulfur, and bacteria. These two systems are very popular for well systems. The second system does a great job killing bacteria.
http://www.waterfilters.net/Iron-Reduction-Water-Filter-System_p_0-889.html http://www.waterfilters.net/Pentek-UVBB-120-1-UltraViolet-System_p_0-445.html
For the drinking water, it is always good to do even better reverse osmosis system filtration:
http://www.waterfilters.net/culligan/reverse-osmosis/US-Filter-RO-3500.htm
Thank you,
WaterFilters.NET