I'm looking at fast wide angles for fast action shots at night this fall and don't really know what to get.  I want 28mm or wider and f/2.8 or faster but there are so many choices!  Of course, I also want one that's cheap.  I've got a list of 16 Canon lenses that more or less meet my needs on eBay at the moment but I want to know if there are any lenses I should stay away from.  Is there a lens for Canons you guys would recommend?