i don't have much of an opinion on grinders but i will say that if what you're going for overall is better taste then making your own ground beef is for sure the way to go, it's definitely more time consuming and labor intensive with all of the experimentation but beyond just adding different seasonings you can also combine different cuts and/or breeds of beef to make better patties. my favorite burger place uses their own blend of steak to make a perfect burger that you can't buy anywhere else instead of just buying in generic ground beef made with who knows what