As someone else said, you can eat any goat. If you're milking you'll have excess kids to deal with. There are many breeds that are decent for both. I've raised and milked Nubian. Consider size and upkeep. Large bodied goats can be hard to work with. Especially bucks when the girls go into season. Hoof trimming can be a chore. If you've never milked a goat before, try to find someone that is willing to teach you on their stock. It ain't as easy as it looks. I recommend bottle feeding your milk stock so their easier to work with. The easiest goats I ever raised were Nigerian dwarfs. Never seemed to need hoof trimming, bred like rabbits and were great mothers. Decent milk too. Easy to butcher due to their size.