First - good for you for coming here, asking the questions you have, being responsible about not wanting an accidental litter, and being honest. It may open you to criticism, but please don't take it personally. There are a lot of strong feelings on this board, especially when it comes to breeding (both from breeders and from those of us in rescue).
I'm with the camp that you should neuter your male, and not breed him, regardless. I understand loving your dog and wanting one of his puppies, but like others have said, that's how a lot of pups end up in shelters - even if you place all the pups in good homes, there's potential that they'll breed, or end up being turned in at some point, and however it happens, your well-meaning breeding caused a dog to suffer and be put down. Just a thought. Negative, I know, but I volunteer for rescue and unfortunately I see it all the time.
Besides, he should also have all his clearances, titles, etc., and at 8-1/2 is getting a bit old for stud. You've held out this long so there's obviously some hesitation. Here's a long-shot compromise - maybe have him "collected" and sperm frozen? (Not sure how feasible this is, but it is possible.) Then get him neutered, have all his clearances done, find the reputable breeder who might be interested and then rethink the breeding. He should be able to go through the neuter surgery just fine - and it's easier than spay surgery at any age unless he has specific health issues (back to rethinking the breeding, in that case...)
In any case, you want to have at least one of them fixed before you have accidental puppies. Regardless of where you stand on the early vs. later spay.
Chamois was spayed very early. Too early. But she was a rescue so there wasn't anything we could do about it.