...and I'm writing this to counter all the recent Canon bashing and flaming here, I can't find anything worth buying!
My 5D2 needs an upgrade, but the 5D3 doesn't have interchangeable focus-screens which I need for wide-aperture (manual) lenses (and the lack of improvement in the shadow noise is a bit of a let-down). The 1DX would be possible, too, but for that amount of cash I'd like 24 or 28 megapixels (with proportionally slower frame rate), everything else is great.
Since moving to full-frame the 70-200 is a bit short, but I don't want to substitute it with a less-sharp-and-inferior-IS 100-400, give me a new version already, or an updated 300 f/4, I'll take whatever comes first! And what about wide-angle, where is the 14-24 competitor, or even a 17-40 or 16-35 that's half as sharp? Where is the quality 20 IS USM to go with the 24 and 28?
And don't get me started on all the missing or crippled firmware features, some decent updates there might have pushed me to a 5D3 or 1DX, but there's no real auto-iso in m with exposure compensation, no proper way to set the min and max shutter speed or aperture in the semi-auto modes, no histogram when zoomed in like the smallest nikons do, ... ... ...
Rant finished, obviously I don't make my living from photography, but that doesn't mean I wouldn't spend some more on it, because I do shoot a lot and some things are often difficult with my current gear!
I used a 5Dc with the EG-s screen for years! and it was perfect but I dont miss it with the 5D3 AF. Granted, I'd like to have both the EG-S and the 5D3 AF. Even the Focus confirmation is 10x more accurate with manual lenses on all AF points.
As for reach, Just get an new M-III tele-converter but canon is lacking in the wide department but If you that serious to buy a 2000$ 14-24, why not look into the Zeiss 15mm?
If your in M mode, I don't see a need for Expo-comp because there must be a particular reason for the person selecting they're aperture or shutter speed. The Auto ISO works great on my 5D3 In M mode. Granted, I would appreciate a zoom histogram.
But you must appreciate that canon DOES have a 100-400mm, canon DOES have the 600EX-RT, and canon DOES have the Best AF on the Market, The fact that canon DOES allow you to even change focusing screens in the first place and so many things that make this platform unique.