Tokina 12-28 being more expensive than the 11-16 has me scratching my head.
Charlie, it is not more expensive. The Tokina 11-16mm price was for a used one, and the 12-28 was for a new one.
See ... I clearly don't drink enough coffee when I'm on vacation.
I'm going to end up trading the 10-24 for the 11-16mm, I can just smell it. And adding a 16-35mm would bridge me the rest of the way across my focal lengths if needed.