I think most of the breeders on here who own stud dogs have unneutered males like txshopper73, femistvr and Laura to name a few.
I am opposed to neutering too unless there is a good reason to do it. My vet convinced me that a dog, just like a person, should be left with all their parts unless there is a reason that is in the best interest of the dog to have them fixed. I took everyone's advice withput researching it very thoroughly that neutering is healthier and I had my daughter's male neutered. Mine, Hefner, came already fixed. They both still mark a lot and are not completely house trained especially in strange places. They wear bellybands when not at home for this reason...to avoid the embarassment. it is part of being a male dog imo.
I plan not to spay my girls either.
Good luck with your Sammie and, no offense, but I hope your husband wins this battle.