Sorry to say, but that is not the sunset montipora that the original poster was looking for. The sunset montipora has flourescent green polyps, and the base is yellow to orange. The picture represents a nice montipora colony, but it is not sunset.
http://www.reeffarmers.com/limitedleptastreasunset.htm
Is the original monti.
Now if the polyps do come out and they are that flourescent, then you do have the original sunset.
HTH