Lens recommendation please

[nomore]

Hey

I have a Canon 10D. I currently have a 28-135 IS lens and a 75-300 IS lens.

Want I would like to get is a good lens for landscape photography. I would really like IS if possible, but the main feature is that it should be sharp. I don't want to spend too much money, so probably a Sigma lens would be the best choice.

Any suggestions?

 

[nomore]

Thanks for the suggestions. How does the Canon 10-22 compare to the Sigma 10-20 and the Tokina 12-24?

 

[nomore]

I would like to see some samples too as I need a nice portrait lens around this focal length. As for a landscape lens, Sigma 10-20;

Its uber wide

Wow, that's cool.

Do you notice and barrel distortion or light falloff with the Sigma lens?