Thanks to the advice of a fellow member, I have been seriously considering the 300 f/4 for my next lens. I am after something in the super-telephoto region that autofocases lightening quick, for sports. This lens appears to tick those boxes, but doesn't have VR. I am concerned that with something with such a long focal length I'll certainly miss VR, especially if I ever venture down the teleconverter route. Are my fears founded? Should I be looking for something with VR?