Well i dont agree with with that couz sometimes u want to play run and gun and some times you want to play look inside. I dont consider rebounding so much important for them couz if you are looking for that kind of SF means that you already have 2 very good rebounders on ur line up. According what you said make the IS much more usefull couz from what ive seen most SF's are actually SG's without very strong ID, so you can actually exploid a weakness of the opposite SF