A standard zoom for the D90? I looked at the ratings on Photozone and discovered that the 16-85 VR, a lens that many on this forum have recommended, is rated optically better (by a half star) than the twice-the-money 17-55 Nikkor. Has anyone used both in landscape shooting? How do they compare in the field? I'm a little confused here because the "you get what you pay for" adage doesn't apply. Thank you.