I breed and show as well, and my lines have excellent titled pedigrees as well, but I have NEVER let a pet quality kitten go to a home unaltered. I also won't let a kitten go unaltered unless it is breeding quality and fits the breed standard, even then I will only sell to established registered catteries. I have had many people wanting to adopt to one of our kittens for "just one litter." There are enough backyard breeders in the world than to allow someone who knows nothing of the actual responsibilities in breeding.
Also, you may have 2 Supreme Grands that you are breeding, but that doesn't mean that the kittens produced will be show/breeding quality. Do you want to just breed any purebred persian, because it is purebred, or do you want to breed to standard, and benefit the breed you have chosen. What preliminary tests have you performed on your Persian's prior to breeding? This is very important. Your titles are great, but can you guarantee the health?
I am also going to assume since you aren't going to alter the kittens before they go home, by your statement, that you don't mind if the adoptive parents keep the kitten you bred intact to possibly become pregnant, or not pregnant, and the risk of uterine infections?
Your post doesn't give a reason, why you would disagree with early altering, most of my adoptive families like that their kitten is already spayed or neutered, it is one less worry and expense for the new family, and again as I stated, people become busy, pediatric altering, GREATLY reduces the males risk of testicular cancer, as well as eliminating uterine infections in the female, and GREATLY reducing the risk of mammary cancer or infections.
This forum has wonderful people, who I have learned greatly from, as well as having wonderful mentors. I am not putting you down, I am trying to explain reasons of why I and others believe in early altering. There are many people who don't know about pediatric spay and neuter, although it has been around for many, many years. I just wanted to educate you on this option that you have. Your reasons, IMO, don't justify, not altering.
Do you at least put in the contract that the adoptive family MUST alter the kitten by age 6 months, to prevent more BYB's from starting up. If not, these may be things you wish to incorporate in your contract. I am assuming you are still fairly new to breeding, there is nothing wrong with that, we all start somewhere, just be open to new suggestions and ideas from other breeders. If you don't have a mentor yet, CFA and TICA have mentoring programs and can set you up with an ethical breeder in your area to help when you need it. Hopefully, the breeder who passed the cattery down to you, will mentor you, if they have the time.
For the record, I also want to state I know wonderful breeders, who don't early alter, but they do extensive questioning on the adoptive parents and stay in touch, not only to make sure their kitten is altered at an appropriate age, but also to help answer any questions that can come up over the lifetime of the kitten or cat.
Again, I wish you well. Please don't find my posts offensive, I am just giving you my opinions and suggestions, for what the 2 cents that they are worth.