I'm an amateur photographer who likes to take photos of sporting events (football, lacrosse, soccer...) that my son participates in. As a way of helping the teams, I sell the photos and give back the profit. (http://sportsmoments.photoreflect.com) For equipment, I have a D300 with battery pack, a Nikon 400300 AFS 4.0, Nikon 180 ED AF 2.8 and a 18-55 AFS 3.5-5.6. I've saved up some cash enough to purchase a Nikon 70-200 AFS VR II 2.8. Because of the existing equipment that I currently have, I am having second thoughts. Any advice on how to spend my hard earned money wisely? Thanks in advance.