I actually had a Nutrimill when I bought my Vitamix. Once I had my vitamix, I never used my Nutrimill anymore and ended up selling it. The Vitamix does fine at grinding grains IMO, but I tried to always freeze the grains first. You can grind flax seed, peanut butter, and make tahini with sesame seeds in the Vitamix, which is something you cannot do with a grinder. I will say that the Vitamix does not grind the grans as finely as a grinder, so it is something to consider if that bothers you. It still makes wonderful bread!!!! I did vote Grain Mill because not everyone prefers the coarseness of the grain ground by the Vitamix, but personally it never bothered me.