Let's say if Xur suddenly appeared as you were walking down the street at night after a hard days work flipping hamburgers, offering his goods to you. He'd give you any exotic weapon of your choice for whatever you had in your pocket. Tell me, which exotic weapon would you take in exchange for your pocketly goods? For me, I think I would take the Ice Breaker...wouldn't have to worry about ammo. I'd lose my cell phone, truck keys, notepad and pen :(