I have 2 males and 1 female basenji , used to have 2 females and 1 male, but age and loss, then rescue changed our ratio. This is the best combination I have ever lived with, but in large part due to the dogs personalities. They have mellowed with maturity, but got along great even when younger, they all 3 really like each other. I agree, if you can take your current dog, let the breeder meet her and see her personality, maybe they can find a pup that matches and will fit in. That is more important than the sex of the pup, IMHO.
Anne in Tampa