Ive had several Sand sifting Gobies trying to find a beautiful one and an effective one.
My favorite looking one is the Gold Head Sleeper Goby, but they put sand everywhere and over all corals. There has not been one that hasn't yet. They often die from starvation due to a lack of micro fauna in a shallow sand bed.
I would highly recommend a Tiger Watchmen Goby...they don't really lift the sand as they like to stay on it. And so far, they have been voracious eaters. They are also quite colorful and interactive.
Sorry if I got carried away.