Does anyone have this lens?

I want to replace my kit 18-55 and 55-200. They work ok, but that is the most annoying split!
I was thinking of getting this one:

http://www.bhphotovideo.com/...DC_OS.html

it had good reviews in the pop photo mag too.
I want it to be good enough to do portraits with. Or what other lens would be good for this? Around the same range and not over $600.
I have a Nikon D5000

I have the Nikon 18-200 lens and, while it is a very versatile lens, I think you should pick up the 50mmG f/1.4 lens for portraits. You will have a lot more control over your background focus.

A prime lens between 85mm & 100mm. Check out second hand examples

Its always better to get the lens for you camera… Meaning not a sigma for nikon but a nikon 18-200 for you camera!

i own the one from nikon and love it. I was going to do the same thing you are thinking about and going the cheaper route. But i decided to spend the extra money and never have regretted it. Its hands down the best all around lens and totally worth a little more money.

i would save up some more and buy that one if i were you.