I ran a photography business for several years and all my equipment was Cannon. I agree with what others have said on here about the Cannon vs Nikkon being like a Ford vs Chevy comparison. I personally think that Cannons are a better choice for action and sports photography. I think the Nikkon shines in the studio and has great sharpness. I feel that the Cannon glass is superior to the Nikkon glass which makes my decision much easier. I dont have anything bad to say about Nikkon and I think that both cameras shine. I personally prefer Cannon over Nikkon though. I can also tell you that I was blowing my competitors out of the water, who were shooting with Nikkons.