I ran across a page full of lens tests and comparisons... the author appears fairly even handed in his observations. He tests a broad range of Canon-mounted lenses, favoring the head-to-head format, and owns the ones he likes the best. Not video oriented, but his determination and generosity definitely help anyone researching lenses.

Lens Tests by LightRules Photo Gallery by lightrules at pbase.com (http://www.pbase.com/lightrules/lenstests)

Great page. I'm still debating whether to consider the Tokina f2.8 11-16 or keep my Canon 10-22 EF-S. I really like my Canon for it's sharpness, but it's slower and probably not as 'pro' build as the Tokina.