Well, I got it. I was pleasantly surprised, I thought it would be more bulky.
I think it was a good price. It's going for $870-$1500 on ebay.
We'll see how it performs with good light outside, RAW, and postprocessing.
Now to really justify getting this instead of the Sigma 10-20 DC, I would have to buy the Sigma 12-24 (FF).