Welcome! As Angiern said, there ARE a number of good breeders in northern California. But don't discount breeders out of your area either, especially if it is important to get a puppy during a specific time frame. As Angiern said, if you want a good breeder close, you might need to be flexible with timing. Like you, I wanted a puppy early in the summer, so that I had the whole summer to devote JUST to his early education before I went back to work in Sept. (I work mostly from home, but I still don't have as much time during the school year as I do in the summer) We have some wonderful breeders in N.E., but none that would have the right puppy available at the right time for me. So I travelled from MA to NC for Kodi, and couldn't be happier with the decision. I love my breeder so much that, even if there WERE puppies closer, I'd go back to Kodi's breeder in a minute if and when I'm ready for another pup.
As far as gender is concerned, from everyone I've ever talked with who really knows the breed, they have all said that, disposition wise, there is little difference between the girls and boys in this breed. It depends more on good early handling, and how you continue to socialize your pup once you bring them home.
I didn't have a strong preference for on sex over the other, and was able to get my pup from a top breeder earlier than I might have otherwise, because they had a waiting list for girls, then had a litter of all boys! I couldn't possibly be happier with Kodi. He has the sweetest, sunniest disposition, is VERY well socialized (partly breeding, partly good early training by the breeder, and a LOT of work on my part to make sure he had (and has) tons of opportunities to socialize with people and dogs of all ages and sizes in safe, non-threatening environments) OTOH, there are lots of people on the forum who will tell you that thier girls are JUST as wonderful!
I wouldn't pick a puppy on either gender or color. Let the breeder help you pick the pup that has the right disposition and personality for YOU and what you want to do with him or her!