Hi All, I was wondering if some people could help me out try to pick up a lens for my wife. Its our anniversary and then mother's day the following day so I best not screw this up! Hoping to do one really nice gift from me but I have no clue about lenses, camera, etc so i was hoping to get some help. If anyone could recommend a lens (or any other great accessory) for what she does, I would be grateful. She has a Rebel XS. She has a 50mm lens and a 18-55mm lens. She generally does family pictures, kid photos, etc. Thanks in advance for all the help!