lol, but the flare thingy scares me a bit, though..
You have to keep in mind what sort of conditions you'll be shooting under. If you're not going to have strong light sources directly in or just outside of the frame, this would be less of a concern.
The 11-16 would probably not have handled this situation as well:
Sun halo-7072 by Guideon72, on Flickr
Whereas, it would have been fine here:
IMAGE LINK: http://www.flickr.com/photos/snydremark/5905803030/
coupe-8127 by Guideon72, on Flickr
As with any lens choice, it depends on what features/functions are more important to you. If you shoot indoors, or in other situations where you need a ton of light allowed through, the the Tokina's likely your better bet, regardless of flare resistance, for the f/2.8.
When I get out to the ocean, I wind up shooting into the sun a lot, but from a tripod; so flare resistance and colors were more of a concern to me than a large aperture.