Hi all, I'm currently thinking about upgrading my camera equipment. I am the photographer for my local football Club (Soccer) and take thousands of photos each month. I currently use a Nikon D3200 with a 55-300mm lens. The combination has been fine up to now producing good results. I don't get paid for doing this. My question is should I upgrade my camera (thinking of upgrading to D7100) or upgrade my lens (thinking of upgrading to 70-200mm f4).