I receommend the Nikkor 18-200 Vr lens (
Nikon 18-200mm) as great choice for topside. Does about everything except if you like to go wideangle or telephoto more than 200mm.
the Nikon 18-200mm VR is sweet.... I really like it. I got one for my father a while back and have used it some.
I replaced his 18-55mm and 55-200mm with one lens.
the only thing I'll say that is not great about it is that it does get a little heavy compared to the 18-55mm over a "long day".
sometimes for inside shooting or anything you don't need a "big zoom" on it's nice to swap back to the 18-55mm just because it's lighter.
You also might notice a small amount of "shading" at the bottom of the pic if using the internal flash when zoomed back to the 18mm setting. This is because the lens is a little longer than the normal lens. not a big deal and it doesn't always happen, but can...
If your on a budget and dont mind two lenses instead only just one the Nikkor 18-55 and 55-200 are great inexpensive lenses and normally these lens come out in a camera kit.
These are great lens, but will just leave you "wanting" for more. with the 18-55mm on you'll "zoom out" and all the sudden hit a "stop" and get tired of it. (when outside shooting). You'll want more "zoom".
You'll get tired of having to swap those lens back and forth.
getting the 18-105mm (regular or VR) or the 18-135mm or the 18-200mm will make you much happier.
I've gotten where I keep my 18-135mm on the camera most of the time now... but if I was buying the new D90 with the new 18-105mm VR, I'd prob use that. (I don't really see much difference in the 105mm setting and the 135mm setting on the lens. FYI).
Combine the 18-105mm or the 18-135mm with the 70-300mm is a better choice. (of course it's a lot more $$$ also)
Hope that's helpfull.