I'm currently using a D700 and AFS 50 f/1.4 for my son's basketball practices. Games to be played starting in January. I have to use ISO 3200 or higher to maintain 1/500s shutter speed. I also get noisy images if I don't do my part to get the exposure correct. Is the D3 any better at high ISO's compared to the D700? If so, how much better? I'd love a D3s but it's out of reach financially.