Aw lots of luck, it's an exciting time!
Just a gentle reminder though - have you asked about the level of health testing the breeder has done etc? In my experience, it is unusual for a good breeder to have a number of pups to choose from that are 8 weeks old, usually they are all reserved by then, and a lot of good breeders will even have the pup's reserved before they are born - have they explained to you why this is?