I have a Nikon 18-200vr and and was thinking about getting the Nikon 70-300VR to add some reach. I am selling my sigma 135-400 APO lens and I am looking for a sharp lens that I can afford. Looking for suggestions. I know this is similar to what I ask in an earlier post but I am interested in any ideas now that the I won't have the Sigma 135-400 lens. This will be used on a Nikon D80 and possibly a D90, Jeff