You might want to consider the new Nikon 55-300 VRII zoom. It is cheaper than the 70-300 VR, is crystal clear and gives you the ability to have a shorter focal length with the 55 on the short end. You get the best of both worlds with that one.
As I have mentioned in other posts today, my D60 with a 55-300mm, in shutter mode, at 1/250-1/400 ss, has been working well for me in our high school gym for volleyball. Basketball is next!!!!