What kind of family? Kids age? What kind of duck hunting? Open water, River, Ponds?

Good advice to see them work. All around you'll be finding a dog that excells in one area and suffices in another.
Have seen close to a hundred GSP in the last 5 years at my buddies Kennel. Most were raised at the kennel, some came here from other horse trades. Maybe 3 pups who I'd consider real water dogs. All of them were great upland hunters. Most everyone of them would retrieve bumpers from the water.
I have raised Chessies in the past. They all perform excellent on the water. I have a female who I'd take to the upland fields for pheasant any day. She does go with the GSP who are older and more seasoned[never with the pups who are still learning] She finds as many pheasant as I need and I never lose a cripple.
Some other breeds to read about and go see:

Field bred Goldens
GWP
ESS
AWS
PP

Let us know what you decide.
Roost