Thank you for your kind words, and I would love to provide a good opinion for you.
Unfortunately, the truth is the value of my opinion (or anyone's opinion) on a given dog's breeding is directly proportional to their experience with the dogs behind it. Since I am personally unfamiliar with the traits of any dog in that pedigree, my opinion is worth little or nothing here.
The people who owned/saw the dogs in your first 3 generations would be the best to ask (especially if they had knowledge of the littermates to those dogs as well).
Jack