So I bought a D600 last year, and thought that this one was gonna cover my needs. Now I got an offer to cover sports, journalism and some events, and was eyeing a D3. I'm not that rich, so I would like to just keep the D600 and do my work with that one, but I wanted to ask you guys first if it's possible to cover sports like baseball, tennis, soccer, football, and golf with a 5,5 fps camera? Could I get away with that kind of buffer and autofocus, or should I just splash the cash? Maybe wait for the D400?
Should mention that I have the 70-200 VRII, 16-35 f/4, 50 f/1.8, and a 2X teleconverter, so please comment if there's other imporvements I can do to my kit in order to maximize the results.