http://m.dpreview.com/reviews/nikon-d750/15 The EOS 5D III is a nice enough camera, but its sensor and AF systems are behind the times, so unless you have a large collection of Canon lenses, the D750 will fit you better. http://m.dpreview.com/previews/nikon-d810/11 the D810 is a more appealing camera than its predecessors, and a stronger opponent to Canon'sEOS 5D Mark III- especially when it comes to autofocus.