I have Nikon D40X Camera and my interest is to photograph Birds with good sharpness and details. I was told that the best lens for that is 70-200 mm f/2.8 D VR G ED.IF lens,but it is too expensive. Could any one help me to what will be the next best lens to buy that is not too expensive and produce the same quality of sharpness and details. VR is important. Please reply to: email@example.com Thank you for your help.