Neutering him is the right thing to do. Good breeders work very hard at elminating bad genes, and hip dys. would eliminate him from being part of a breeding program. He will possibly have a healthier life if he is neutered, too.
See my handsome red boy? At his original kennel, all the dogs must pass yearly hip & eye tests in order to be in the breeding program. His parents were removed from it because his litter all had a genetic defect, and he & his siblings were all neuterd/spayed. I applaud you for being a responsible pet owner.