Look out for the Tokina 20-35mm f/3.5-4.5. Older AF lens built like a tank and cheaper than f2.8 version. Really good bang for the buck and usable on FX format. I have used this as a back up lens for years. PM me if you're interested.
I think Ken Rockwell has mentioned this lens before (if you buy into what he has to say).
I think Ken Rockwell has mentioned this lens before (if you buy into what he has to say).