I have noticed quite a bit of praise for the above lens in this forum to make me wonder if I should add this lens to my current collection of Nikon 18-200 VR and Sigma 10-20mm lenses for my D60. Is the clarity of this lens noticeably better than my current lenses? If so, does anyone have photos to share to demonstrate the difference? If the difference is subtle, then I would rather put the $100 in my piggy bank towards my future D300. Thanks in advance.