The answer is pretty simple, assuming by "wide angle" you mean wider than the traditional 17mm or 18mm starting point for standard zooms.
Tokina 11-16mm f/2.8 is the option if you'll be shooting in low light, doing night photography, or shooting any video. Canon 10-22 is the option otherwise, if you'd just be doing landscape work under normal conditions. No real reason to go with the other options when these two are so proven.
The other consideration would be the 15-85 to replace a standard zoom; but the difference between 10/11mm and 15mm is big.
Personally I use the Tokina on my 60D, and I love it. Super sharp where I commonly use it from f/5.6-f/11, but also still good for night photography at f/2.8