Considering buy the Nikon AF-S NIKKOR 55-300mm f/4.5-5.6G ED VR Zoom Lens for my D7000. Thoughts? I have the standard kit lens that came w/ my D50 several years ago, but have wanted a 300mm even w/ the D50 so....birthday coming up, why not scratch that itch. Oh, might let the D50 body go if anyone interested. Works fine and didn't really need to replace it, just kinda' wanted that D7000.