Hello all! I have a Nikon D60 DSLR and am in the market for a zoom lens for it. I do LOTS of traveling and take pictures of cities, landscapes, wildlife, people, architecture and almost everything under the sun (and some things that arn't). The Nikon AF-S 18-55mm that came with the camera does most of the general stuff I do, but I also find my self in forests or jungles and can't seem to snag that nice photo of a bird on a branch or that porcupine booking it down the hill. I don't have the funds to buy the National Geographic/pro, $1,500+ lenses, but am looking for a middle ground. I don't mind buying used lenses so that may help. Anything in the $500-800 would be OK, but of course, the more affordable the better! Any and all recommendations are welcome. Thanks!