I'd like to congratulate our OP for taking the time to do her homework and being open to long-time basenji owner suggestions. It can be hard for your head to overrule your heart, especially when you've seen pics and really want that cute puppy.
I'd also like to give you a little something to think about based on my life experiences with basenjis. I purchased Digital as a 10 month old puppy from a very good breeder. I had an older basenji and a lab at that time and worked away from home. So getting a young puppy would be difficult given my work schedule. Because Diggie came from a breeder that cared about his welfare, he was house broken, leash trained, show trained (he was my first show dog), crate trained, socialized to men/women/kids/other dogs, vet work was done, etc. I brought him into the house and he was past the chew stage and knew to go outside to pee. He was the easiest dog I've ever owned. I also knew a great deal about his temperament - what I saw was what I got. (Although, at 10 months, there can be some later maturing with some dogs.) And off to classes we went. He trained me how to do conformation stuff and together we learned how to do agility, therapy, rally and coursing. He went on to earn 30 (or more) titles. I absolutely adore this dog and could not love him more or be more attached to him if I'd gotten him at 2 months. He is also very attached to me as he as proven time and time again by performing accurately in agility trials. So, my advice, is don't discount older puppies/young adults especially when looking at dogs from good breeders. They are, in many, many ways much easier than a young puppy.