If you don't mind paying less, you might order a couple of sample pucks (they are very LARGE) from Stirling Soaps. I live in south Texas with rock hard water and they do great. Rod is also great to deal with. I use several of his soaps. Two of my favorites are Ozark Mountain and Margaritas in the Arctic (my favorite menthol soap).

http://stirlingsoap.com/shave.html

Bob