I see a number of posts lately by private sellers not, Canon authorized dealers, in various buy and sell forums advertising BNIB 5D III with warranty like this example:" 1 year warranty applies until 12/3/2013. I will provide you a copy of the sales ...
glongstaff: There is a excellent review here is you have not seen it: http://www.the-digital-picture.com/Reviews/Canon-EOS-6D-Digital-SLR-Camera-Review.aspx "Made to focus in very low light condition: EV-3 is the strongest low light AF performance ...
The lower megapixel count on the 1Dx wa probably a compromise between frames per second and resolution as explained by cicopo. 18 mp in the right hands is enough to produce stunning 24X36 prints.
Texas Tea: When doing action sports, I have found that using the center point only is where the 6D really shines. Most pro sports shooters use the center point only method or move the single point to where they need it.