I had an 8, and believe me, you don't want one.  As a young waterfowl hunter who shot a 23/4" Lefever double, I was awed the first time an old "Riverman" ,who had forgotten more about ducks and geese than most seasoned hunters ever know, handed me his 10 gauge double barrel and a couple of shells to try.  Several seasons later I got my first 10 gauge shotgun.  That was 41 years ago.