I knew I'd fallen down the rabbit hole when my dad and I started going in on 50lb sacks of wheat berries from Eastern Washington (I'm in Seattle). I can't remember, I think it's like 20 or 30 dollars a sack. I have a mill attachment for a KitchenAid, it's not awesome but it does the trick. My dad bakes 100% ground berries (so completely whole-wheat, by definition), but I mix it with bread flour -- using whole wheat to feed the sourdough starter.
It produces an absolutely incredible flavor. If you give it a slow proof and bake in a cast iron dutch oven, you get these amazing cinnamon and nut smells as it bakes. Just the most delicious bread.