Mossberg, but you might want to look at a different mossberg pump-action, like the 500 or 590, if you won't be hunting waterfowl with it.
The reason to get the coach gun woud be that you're not going to practice with it much, or that your home is very small, and manuvering the mossberg would be too difficult. If you're not house clearing,(and you shouldn't be house clearing) that's probably not the case.