Nikon 18-200 Lens
I bought it a year ago and since then I fell in love with it, because you can do (almost) anything with it.
You can shot inside a museum using the wide angle or zoom in to catch the most little detail of a building facade.
It's the best lens for the tourist who walks down the streets of a big city or wanders the paths of a National Park looking for the best shot.
Before I bought the Nikon 18-200 Lens I used two different lenses to cover the same range, the 18-55 and the 55-200.
They're both very good lenses but they have one big problem, you have to stop and switch them whenever you want to go from wide to telephoto, and in the process you might lose a good shot.
Not to mention the continuous changing lens bring dirt inside your precious camera.
In my opinion, it has only one little downside: it weights a lot, and carrying your camera around your neck all day can be a bit painful if you're not used to.
But this way you don't have to carry around a bag to hold the other lens, and that's a big plus.
There are some other brands that make 18-200 lenses, but they're not barely as good as this one.
As a general rule, Nikon lenses are always the best, and unfortunately you pay for their high quality.
But good lenses don't lose their value, you can bet that their price will remain high, not like cameras that can get obsolete after a couple of years.
So you should consider buying a quality lens as an investment, and if you've got so money to spend, use it for a good lens and not for a new camera.
Of course this Nikon 18-200 Lens comes with an image stabilization system, that Nikon calls VR.
This is essential when using the telephoto end of the lens, so your pictures won't result blurred, as long as you don't too low with the exposure.
The VR is useless when shooting moving subjects in the dark.
So if you use your digital reflex for fun, especially when you're on vacation, you need this Nikon 18-200 Lens, because it's fun, sharp and practical.
What else would you ask for?