Personally, I wouldn't put one on the wall unless it was 13 pounds or heavier.
That being said, I'm within four hours of Green Bay and Little Bay de Noc where 10+ pounders are common. Look into the kind of fish your water is capable of producing. Do you see 8-12 pound fish hanging in the bait shops? Do guys talk about catching them that size with any frequency?
Thats a great fish, walleyes of that size are also my favorite to eat.
Now show us a picture