Just to let you all know I have just received my latest digital copy of Outdoor Photographer and the 1DX has definitely replaced the two models I have mentioned in my title. I quote.....
"Scheduled for a Spring 2012 realease, the EOS-1DX replaces the EOS 1DS MKIII & the EOS 1D MK IV. This new flagship DSLR is one of the most anticipated cameras ever, and it's feature sets looks impressive, to say the least."
So for those of you expecting upgrades for these models.......sorry but it's all over.