I choose 1DMKIV. For me the bottom line is always price and return of investment. I will not get any more return on my investment if I baught the 1Dx and I doubt many others will either. There is no need to get one for bragging rights on POTN. You should get one if you can justify the need you have for a camera body.
I contacted Jeff Ascough about his decisions to switch to the 1DmkIV and his thoughts about the 1Dx. His remarks tell me he has had a 1Dx in his hands so im pretty confident A guy like Jeff would be a great person to get an opinion from.
Here are Jeff's remarks
" I have been using 5DMKII for 90% of my work this year with the 1DIV for certain situations where I need more iso.
The 1DX is a completely different camera to the 1DIV in every aspect. In fact the only thing that is remotely similar is the body shell. AF is totally different as is the metering system, processors, colour management, software, menus, viewfinder, mirror assembly and construction, shutter - it is not at all like a 1DIV. In terms of image quality the two cameras can't be compared as the 1DX has a +3 stop speed advantage over the IV.
Hope this helps-- Jeff "
1Dx is going to be an outstanding camera but I have concluded its way more camera then I need or can afford(7000.00) for my business needs. For my money, a 1DmKIV (3999.00 canon refirb or $4600.00 new) and a 5DMKII combo (2200.00) gives me two cameras that meet all my needs. Its really comes down to about $6500.00 for 2 outstanding cameras v/s 1 camera at $7000.00. As a wedding and portrait photographer, who shoots sports occasionally, and wildlife for fun, 2 camera bodies are a must have and not an option.
For me to lay out $7000.00 for a 1Dx and have to sell one of my cameras to drop the actual out of pocket expense down to $5000.00 is not that bad. I could do it. To do the same thing and pick up a 1DMKIV with an out of pocket expense at approximately $2000.00-2500.00 makes more business sense. Again, Our clients will never be able to tell any difference in the final product and a 1DMKIV get me the iso performance and Focus system I have to have for my business needs --- so the decision really gets down to bragging rights between photographers and whats in the best interest of your business. Significant reasons for a professional to upgrade to a 1D series camera over the prosumer cameras such as a 7D or a 5DMKII.
Thats why we went with the 1DMKIV over the 1Dx.
Photographers will see a fairly significant difference in the files but i can promise you with 100% certanity, your clients will not.
We are going to use a 5DMKII for full frame needs and our 1DMKIII and a new 1DMKIV for our needs. Very happy with the decisions we have made.