The Savage slug gun, being a bolt action, finds little favor among the shot-gunning community. One of the advantages of a shotgun (be it a pump, auto-loader, SxS or O/U) is its rapid fire at rates well above those obtainable with a bolt action design. The typical bolt-action is a hell-for-stout design to accommodate working pressures well above those encountered with shot-shells. With big bores and relatively low pressures, shotguns are built to be light and fast handling. And, that's the way shot-gunners like 'um. I see only one advantage to the bolt action shotgun: It offers a narrow segment of the shooting public a rifle-like environment where slugs are required for hunting.
In the same price range as the Savage slug gun are Mossberg and Remington pump shotguns with slug barrels. Do you want a single purpose slug-shooting rifle or the versatility of a shotgun that can shoot slugs, buck, bird and target shot and accommodates interchangeable barrels?