Hi, I am new to Nikon Cafe. I am saving like mad for a good quality telephoto lens. I have shortlisted the 300mm f/2.8 VR or the 200-400 f/4 VR. I like to shoot some sports, Wildlife and when I can afford it, visit Africa for safari. Iam favouring the 200-400. Is it a match optically to the 300? does it focus Fast? Any thoughts anyone.