Lens advice for D7000

Hello all,
I am looking at expanding on my lenses for my D7000. I currently use mainly the Nikor 18-200. I am looking at the Sigma 150-500 for extra reach, also the Sigma 10-20mm. If anyone has any hands on experience with these lenses I would appriecate any advise. Backdoorhippie AKA Jake, I see a 150-500 listed in your equipment but it doesn't mention Sigma. The apertures match so I'm presuming this is the Sigma. Also you mentioned you have it attached to your d7000 in a recent post so any advice would be helpfull. Thanks in advance.

Martin, I have the Sigma 150-500 as well (on a D7000), and have been very happy with the results I get. Take look at the images in my flicker account to get an idea of what you can expect. Nearly all of the bird images are with the Sigma.

Flickr: cgilyeat's Photostream

Colin

I'm not familiar with Sigmas, but know that a lot of people like them. So, the 150-500mm sounds good. I'd love to have one myself. I do some wildlife photography. The lens I use most is a Tamron 70-300mm, which I like a lot. If you have a use for it, I'd get the 150-500mm. Good luck!