No one here is in a position to give or not give you permission.
You asked for opinions. You got opinions.
And I'm not sure why you're asking what we think, considering this sounds like you've already decided that a DS could be wonderful for your family.
I don't think any Chazzers own a DS.
Amen Corgi.
To the original poster:
I've read all your posts, and you never mentioned if you yourself have spent any time with a DS in person. There are people who responded who
have spent time with typical examples of the breed.
My advice is for you to find some PP clubs in your area and find out if any member have DS that you could meet, or you could pick their brains about what life is like with the breed. Find some breeders you admire, and e-mail them. They live with the dogs. If you can find one close enough arrange to visit the breeder and see what the dogs are like in person.
Personally, I am going to echo everyone else's concerns about bringing a dog like a DS into the situation you are describing. I would NOT be comfortable having the dog loose when guests come over, and that definitely includes guest children. I would be very concerned about my own small children too. A dog with the type of drive a mal or a DS has probably won't be the best at controlling itself when a 5-7 year old kid is running around screaming.
The other thing I'd be worried about with such a range of ages in children is the dog getting itself involved in sibling squabbles. I came from a big family, and we tormented each other as kids. I still remember my uncles
afghan hound taking it upon himself to pin an older child to the ground and growl in its face (she was a cousin) when the dog felt the kids were getting "too serious".
If your older boys are teasing the younger a little too "intensely" for the dog, will the dog be content just to pin them? Or will the outcome be worse? If you need to disclipine your children, will the dog let you? We used to have an elkhound who would try to rip my dad's face off if he spanked us. Even if you just have verbal confrontations within your family, the dog is going to pick up on that and depending on it's temperament, drive, amount of activity/exercise, react in a variety of ways. Some of which will not be positive for anyone involved.
And I'm still not sure why you're so adamant that you need a DS? I can think of a boatload of other breeds who fit every other trait you like in dogs who would be a lot easier to live with and a lot less liability.
EDIT:
About your experience with GSD breeders. If
any breeder gets offended by your questions and is evasive/refuses to answer, they are not worth dealing with anyway. So your gut is right on that one.