Motion blur can add to effect but you don't want it in every shot, you want it as a deliberate option. Secondly motion blur is best when used to depict action, it is an obvious mistake when the wrestlers are obviously pretty static but nothing is in sharp focus due to motion blur. Nothing beats as fast a lens as possible which in the case of a zoom means f2.8 and then add a high ISO speed with noise reduction software if necessary. As far as IS goes of course it is better to have everything else being equal but I would go for the fact that the Canon 24-70 maintains it's f2.8 all the way through the zoom range where as the other two don't which may well make the long end of their range useless for your specific needs. Only snag is the cost.
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