I never saw the term 3-D mentioned but if that is what you are looking to do then the 100 and 115 still isn't a great choice. Ever thought of a YS like there 115??
If you phone AW they are very nice folks and are happy to tell you what they like to use in there planes for different types of flying. They may recommend one of the smaller gas engines for what you are wanting??
Going directly to the source is a good idea.