I have the indo-pacific half black half white in my 75 and personally I like the look of it. I don't have a goby, but have a green coris wrasse and a sea cuke that do a fine job of keeping it turned over.
I have to say I love my black sand, even with the broken pieces of rock and shell that have been occurring over the the last 6 years. I also have a black back and between the two the corals just visually pop.