Here is the simple fact of the real world: Wedding photographers, event photographers, landscape photographers, studio photographers, etc...have all been making FANTASTIC photos, for many years, with digital cameras that have far worse specs than the 5D III. It didn't matter if they had 8 stops, 10 stops, 12 stops or 13.8 stops of DR. It didn't matter if the read noise was 30 or 8 or 3 electrons. It didn't matter if ISO was limited to 800!
An extra stop or two of DR is not the end of the world, and it won't change things much in the real world. Your still going to have to use that reflector or fill flash. Your still going to have to slap on that GND filter. Your still going to need to expose properly, and if you need more saturation for a given aperture and shutter, your still going to have to use a higher ISO rather than a lower one. Your still going to have to be a cunning photographer.
It amazes me how all this craziness has ensued (mostly on DPR, but also here) over the LEAST significant bits of ONE particular ISO setting that only matters to a FRACTION of the total number of shots that CERTAIN photographers may take SOME of the time. Seriously, ppl.
I think this thread is particularly indicative of the danger of making such a big deal out of something that really isn't. Poor @tonyp here, who's business is pretty heavily invested in some very expensive Canon lenses, is so worried
that the 5D III is an actual DUD
that he's literally thinking of switching brands...because the grass on the other side has been hyped up so much one would think it was quite literally a vibrant, neon green that glowed in the dark and tasted of ambrosia!
I call that...the worrying of the average joe/pro so much that they actually consider wasting money to switch brands...a true disservice to your fellow photographer.
@tonyp: Keep your gear!
Save you and your wife a LOT of money. There is absolutely no reason
to worry that Canon is going to do you, your wife, or your business a disservice, now, next year, or far off into the future. They are an excellent company, they make excellent gear, they provide excellent service (speaking from personal experience, due to my own hands fault on several occasions, it really is EXCELLENT, FAST service), and they DO
MAKE A COMPETITIVE
Save yourself some worry, and realize that you have some fantastic gear already...the 5D III won't be any different. It'll certainly be an improvement over the 5D II on many levels.