Sounds like dream goats! Yes, our two Nubian does are first time moms, one's had her babies weaned since late April and she is giving about 2 gallons a day and the other we just weaned the kids off her and she isn't producing as much but she also does not like being milked. The other one is a doll to milk.
Other than being larger, their temperaments are pretty stable, solid and their milk is pretty sweet as well. Do you feed molasses? We were told to give them a bucket of molasses. Is that for iron content? They kept tipping this bucket over so we stopped giving it to them.