I know the Nikons, but I don't know the equivalent Cannon equipment. Can somebody please post the Cannons that are in the same class as the Nikons? D40 D60 D70 D80 D90 If somebody wants to post the higher end cameras and their equivalents then that would be cool too. I'm not looking for this to be a discussion about which is better. It's just that I see a lot of posts where people discuss Cannons and I don't know which is which. Thanks!