I agree with those above. I started with a Kitchen aide grinder attachment, and it worked, but it tended to bog the motor and the motor got fairly hot. I bought a 3/4 HP grinder on sale from Gander Mtn a couple years ago and the difference is nite and day.
As above, I can't keep up with the capacity of the thing. I don't think I need a bigger version, though some may. I am glad I didn't go with the 1/2 HP version as I am completely satisfied with this one.
It also has an attachment available for tenderizing the pieces, using the motor to run it. Like that too.
ChuckC