What do you consider best? Do you want peace and overlook some foliage or do you want to be able to see the ocean? Most would probably say to get an ocean view room and request a high floor room that faces in toward the pool. I usually save the points and get an Island garden view room and request a high floor overlooking the luau lawn. For me, that is what is the "best view". I will say that room view does not really matter as much as you think it would. You don't typically spend much time in your room and if it comes down to staying longer or a "view", pick staying longer every single time.
Also, rent a car for your stay and go out and about around the Island. It is absolutely beautiful there with some of the most unique landscapes on the planet.