I have shot a local tennis tournament with the 1DX and the sound is pretty substantial. Silent mode on the 1DX is a joke...sad really.
Have to agree with that. There is a difference between the normal mode and silent mode but it is not that great, and definitely not silent. Plus what it does to the fps is not good!
You might want to read this article by Peter Read Miller about settings for the 1Dx: http://www.sportsshooter.com/news_story.html?id=2678
Will do, thanks.
Bit silly using it on a job if you dont know the camera. I would use your previous camera that you know well and experiment with the 1DX until you are confident with it.
I agree, and if it were a 90-minute game of football,l or 80-minute game of rugby I was shooting, I would not dare. But, the event I am doing gives me more than ample space and time to make errors and still get a decent shot. Plus I have two cameras with me so if I feel I am loosing my way with the 1D X AF system, I can always revert to what I know best.
I shoot sports in RAW and have to change the battery in the middle of the day (~20K+ per weekend of shooting) since it slows down (below 12 fps) after the 1/2 point of a charge. Not a big deal though. I use the Lexar 1000x cards and yes, they do make a big difference when shooting RAW bursts.
I learned very quickly yesterday, that I will definitely need some new (bigger) memory cards.

Thanks for your replies everyone. I have to say, I am very, very impressed with the 1D X. It is going to take some getting used to (especially the AF system) and the one thing I do wish I had changed before taking 2,000 pics is the file name system it uses as default. My mistake, as I forgot, and ended up with CODEAAXXXX instead of IMG_XXXX which is what I prefer.
The sound is something else, and quite a few people around the photographer's area commented on it. A couple even said it sounds like a machine gun! I am happy I am not shooting any tennis on Monday as I am not sure what I would have done.
