For anyone using the 5D Mark III in any serious shooting, and especially for their profession, I know very few people who would complain about the price. It's fine. The camera is such a big improvement over anything before it. Well worth the money, well worth it indeed.
The sensor isn't nearly as similar as people are describing. This is probably the most ridiculous forum for photographers out there, reading through this place is sometimes so hilarious. The camera appeals to so many aspects of photography that it never did or could have really catered to before. Haha.
The 1D-X is a mighty piece of gear, for what the 5D3 is, I have absolutely no need for the 1D-X, and I personally know a good handful of people who feel the same way. The 1D-X was announced officially before the 5D3 ever was, and A lot of us were saying "there's my next camera", but the second the 5D3 was official, that all changed.