Originally Posted by Nightshade
Try the sigma 17-35mm f2.8-4.0
Its affordable and I personally use one and have been more than happy with it. I do wish it was a bit faster at 35mm but its not anything you can't learn to work around. For the price its an excellent lens and I have no plans of replacing it unless I find one down the road that is faster than it is.
Actually I was looking at the Sigma 15-30mm f/3.5-4.5 EX Super Wide Angle. The 17-35mm looks about $110 cheaper, maybe I'll have to consider that one too.