I will have to think about this more. On one hand I don't currently have a 3 inch .357, but a couple .32's, and just one 2 inch .38. I do have plans to get the Taurus .357/9mm 7 shot with the 6 inch barrel. I don't think I need that many .357's and the interest was in the light weight of the .38, but the post above does make a point that the steel of the .357 will last, the Aluminum... IDK. How have the airweight S&W .38's held up over the decades?
I guess the deciding factor will be whatever is available at a good price.