I really wish my 5DmkII was weather sealed. Half my lenses are, I can't understand why a 2500.00 camera don't have more weather sealing then it does.
Nikon seems to have lower prices for their bodies then Canon does. What steered me toward Canon was when I was into astrophotography, Nikon used a weird noise reduction feature that needed for the camera to be shut down to prevent it or something like that. Been a long time I can't remember, but there was a few other things too, Canon has a stronger response to the Hydrogen Alpha spectrum even with the IR cut filter.
By the time Nikon got me interested (with their slightly lower priced bodies and weather sealing and so on) I had already amassed a largish amount of canon lenses.
I look forward to your thoughts on your new toy