I can't have a dog that will bite my kids.
While I understand what you're saying, and the others do as well, there's no guarantee if you get a puppy from a good breeder, or a puppy or even older dog from a rescue or directly from a shelter, that your kids won't be bitten.
(In fact an employee at a petstore locally said something I'll never forget...when I was looking at an animal at their store, and asked "Do they bite?" the gentleman said "This is what I tell everyone - it has a mouth, it has teeth, if it has those things, IT CAN BITE". Wise words!!)
The main thing about puppies is that when they bite, it's out of play, not aggression. However, many people mistake it for that and try to scold the puppy for this type of play.
The problem is - puppies only know biting when they play. They can't play "Go Fish" or "Monopoly"! They play with their new human families just like they did their puppy siblings.
It's up to their new humans to supervise and to teach "gentle" when playing.
Furthermore, a young adult or even a fully grown dog can bite your kids...the dog is 1/2 to 3/4 of the equation, your kids are the other portion of the equation. Have your kids been around dogs, to know how to treat them? Some toddlers and younger kids are amazingly rough and not very nice to dogs, especially if they aren't taught how to be around them. They will do things like hug and kiss dogs, and many dogs find this unpleasant, so the dog will bare it's teeth (a warning - "back off, I'm uncomfortable!") but the children, sadly enough, don't know or understand what this means so continue with the behavior and are bitten.
That's where strict supervision and teaching your kids the proper way to interact with the dog comes into play.
Kids have to understand that dogs don't enjoy some of the same things we do, when we show each other affection, and care and supervision and teaching must be done.
AND no matter if you get a dog now or some time in the next year or two, PLEASE check out this page.
Family Paws-New parent classes dog and baby