This one caught my eye, it's a waterfowl/pigeon gun with a beautiful stock, but the stock is a Monte Carlo. I understand that is to essentially have it shoot higher then it looks so that the target is always fully in sight, correct?
No exactly, cc1900. Monte Carlo is the solution to a "high" comb and a "low" heel. The top of a conventional stock is a straight line at some angle to the extended rib line/sight line. There is only so much you can do with that set-up. For example, the conventional stock will have only one location that is the "face drop" needed by the shooter. If the shooter has an imprecise mount and needs a section, as opposed to only one point, of stock top of "drop at face" he requires, the Monte Carlo is the solution. Also, the Monte Carlo can rise toward the butt so that felt recoil to the face is lessoned.
True that Monte Carlos are more common/popular on rifles, but that does not mean Monte Carlo has no place on shotguns.
Have you been fitted for stock dimensions?
Have you established the handling characteristics you want?
Have you decided the primary purpose for this gun?
Have you read Dig Hadoke's books?
DDA