You won't see anyone on this thread advise you to buy a 1D X with your existing lenses. So if you are looking for justification to go for the 1D X, you should probably look elsewhere.
At the end of the day, both are good cameras, so why worry your head. Just buy what your heart desires and you will be happy with it. Good luck.
I hear ya. I usually dont worry about others opinions as if I want something I buy it... as for test driving... if it does what I need I adapt to my tools.... just me...
I see a couple of options
with sports in mind I have a question though is it indoor and outdoor sports or just outdoor or just indoor?
get the 1Dx and get the tamron 150-600 and a canon 135 f2L
If i was in your position and was looking at sports mostly this is what i would do
I think the AF system upgrade of the 61 point system is worth it and get more glass later
while the 1D4 is good its getting old now and you can only get second hand with no warranty so you have to consider that too....
to answer your first question...
indoor - MMA both 7yr and 14yr old do Mixed Artial Arts
outdoor - both do street hockey and travel soccer.
The biggest issue I have with the 1dm4 is just what you said... 3k for a camera with no warranty. tough to vouch for... yes 1dx is considerably more but warrantied.
tamron 150-600 I see would be nice on either but 150 is not short enough. I have used my 55-250 and while on a crop 55 made me lean back so 150 would miss that shot in outdoor soccer. 600 would be nice... I have leaned towards wanting the sigma 50-500 for a compromise and I understand the issues with it.
side thing I didnt mention... If I do not use all the money leftovers will somehow trickle into the bill fund. while I have thecoppertunity I want to look at my best options. I know glass b4 body but some bodies make a difference eventually in certain situations.
I have always lusted the 1dx and can get some glass now and slowly add what I need. I sell hobbies to fund hobbies...
while people look at the price of 5dm3 / 1dm4 / 1dx and know value... at the end if wife gets mad im spending all the money on camera gear... she dont care how much each piece is. she just knows guy is giving me $7k and im spending it all. sell my winch for $1000-$1250 and that will purchase another lens.
it took me a lomg time to ebay up hobbies and get the gear I have now (2009) so I need to make the wise decision because after this purchase I wont be buying again until like 2020 or longer.
thanks for sticking with me trying to help and not getting frustrated....
in 1 week with cash in hand im gonna post up what will be ordered....