George, how much milk do you actually need? A couple of sweet, little Nigies from champion milking stock can give you all the milk you need. My friend raises Nigies and has more milk than she knows what to do with. Hers are from excellent milking lines.
Westwood, I have to respectfully disagree about the Nubian. Nubians have the hardest time in our New England climate, in my experience. A Nubian cross does okay, though, in most cases.
I have several breeds of dairy, and several crosses. In my limited experience, and from what I have gleaned from others, Nigies are the hardiest for our climate, followed by Alpines and Alpine-type breeds such as Toggies and Saanans.
The teats don't stay like "pimples", milking does enlarge them. It is not that hard to milk them, just annoying to those who are used to the full hand squeeze. Or you could use the Maggiedan or Udderly EZ milkers with them. As far as milk quality, my personal preference is for Nigerian Dwarf milk. The high butterfat content makes it very sweet, and the high protein content makes it ideal for cheesemaking. The milk is delicious! My Alpine's milk is very good, but (looks around furtively for Ruth) ir doesn't hold a candle to the Nigie milk!
If you are interested in excellent, championship lines Nigies, I know someone who has beautiful animals for sale. If you are looking for Alpines, I know two other herds of beautiful animals from championship lines. All are CAE and CL tested herds.
It is good that you are asking advice and thinking this through. I believe no matter what breed you choose, you will be very happy to have gotten goats. They are so unique, and useful, too.
By the way, Westwood, nice to "see" you!
Blessings, Jill!