A.H.
I have a Nutribullet and that thing pulverizes anything! I have the single serving cups that you can drink right out of and it also comes with a second blade especially for grinding up flaxseed, millet, nuts and such. I like it because the price is also great. You can get them at Bed, Bath and Beyond for $99 and also Kohls. If you get the 30% off coupon then you can get it for $70.
Cuisinart and Vitamix are great brands, but they are pricey. Magic Bullet and Nutribullet are reasonably priced and work great. I have also heard great things about the Ninja and they are not too expensive either.
Good luck!
A.