Just posted: Canon EOS-1D X Mark II Review.
This is a very impressive-performing camera. The AF system is perhaps my favorite improvement, but ... there are so many other great things about this camera.
B&H has the Canon EOS-1D X Mark II available for preorder with 13 months of Canon CarePAK coverage free (upon camera registration). Get the premium kit which also offers a free CFast 2.0 card and reader.