Does anyone else enjoy using these "older" lenses? I just picked them both up from a friend and really enjoy the feel of them on my D300. Something about the construction vs. the newer plastic counterparts. Also, the colors seem a little more "real." Don't get me wrong, I love, love, love my 24-70, but for lighter travel alternatives, the 18-200 was a pure disappointment. Seems like one of these two may fit the bill. Also, I have read alot about the 28-105. Has anyone any experience with the 28-105 vs. either of these two?