There's a thin line between "need" and "want" in the firearms world.
My belief is that if you can afford it, go ahead and get it. Doesn't matter if its a want or need. Now if you have a family to feed, or a wife to ask permission from, its a different story obviously.
Also, everyone "needs" a 22lr rifle or pistol.
Everyone needs a good revolver.
Everyone needs a shotgun. etc, etc.
but all depends on a personal level.