Hi,
It depends on what you want to do with them- if you get kids they will grow up with you and be nice and friendly. But you will have to wait longer for your milk- goats are best not put into kid until they are 18 months old, so next autumn, meaning they have kids about the time they are 2 years old. If the people who have offered you the kids, have kids, do they have any milkers for sale as well? If you got a milker with the two kids to keep her company, you would get your milk.
Also, this does mean you have to go through kidding, and learning to milk your newly kidded goats- certainly not impossible, but challanging at times.
Bill and Margaret Scott in Leven used to always keep a Anglo-Nubian male, but I am not sure if they still do. However I always have a male, so as long you get your animals CAE tested, you can bring them to my male.
AN's are great to keep- they are the breed I have. They are not as good supplying year round milk as some of the other breeds, but the milk they do produce is richer and creamy.
Who has offered you the kids if you don't mind me asking? I don't know anyone with AN's who already has kids.
Beth