Since you are just asking this question to be asking, I would say NOT to buy a shotgun JUST for deer hunting, but to me, you are taking the short sighted view of a shotgun.

A shotgun (let's use a Remington 870 just for grins) has alot more uses in an arsenal than a rifle. With the change of the barrel (and barrels for an 870 are not too expensive), you can have a tactical close quarter defense weapon, or a big game slug gun, or a upland bird/duck gun, and actually, the uses are unlimited.

I LOVE my rifles, but if the "laws" were changed to where I could only own one gun, I would keep my Benelli Super 90 shotgun without hesitation. I have already proved that it is good for anything from squirrels and rabbits to quail and ducks to deer and hogs. It is the most versatile gun in my safe.