Well... The 1DxII is very interesting but unless your going to make the jump and try and carry 3 feet of camera everywhere you go your just gona be stuck on that tripod, and I'm not really interested in that kind of shooting.
The D500 is a capable camera but I would challenge anyone to stand beside me and get better ... paper means nothing in the field.
Maybe grab that 500 and come shoot this next two weeks... Heading up to where I shot the Wolf last year. That area didnt burn so that pack I hope is still in the area.
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forum: Canon Digital Cameras
Although I like the sound of the 1DXII it's too much for me really, both cost wise and tech wise so I'll hang out for the mkIII as long as my mkII keeps going. I'm on your side when it comes to that challenge, it's not the camera.
Good luck with the wolf hunt, I wanna see the pictures! 

you can not get that close to them here and of course I dont get that lovely snow background either 



