With the TiVCT technology the new 5.0L doesn't really need aftermarket cam's in order to see big hp gains because this technology adjusts to all sorts of different profiles in order to make max power and still deliver good drive ability and MPG. I think aftermarket cams will be reserved to the guys that are going for BIG hp numbers.
Speed Channel's 2 Guy's Garage gave some great incite into all the new technology in the new 5.0L. Here's a link for those who may want to learn more about TiVCT
http://www.twoguysgarage.com/index.p...on-9&Itemid=77