Welll I already wrote this, so might as well post even though someone beet me too it...
I guess its just confirmation...
I dont know if New Belgium treats there water or not but the water quality for Fort Collins, CO is as follows:
Ca++: 16.6ppm
Mg++: 1.7ppm
Na+: 2.8ppm
SO4-:12.7ppm
HCO3-:44ppm
Cl-: 2ppm
Hardness: 48ppm
Alkalinity: 35.9ppm
pH: 7.9
This seems like a pretty "clean" water profile in terms of mineral content... I would tend to aim for something with slightly higher calcium and sulfate content...