Check out the detail I was able to pull with a 400mm shot.
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For white balance, your first best option is to use a styrofoam coffee cup as a white balance target. Styrofoam has a nearly perfectly flat spectral response, far superior to that of any of the commercial white balance targets. It's also about 80% reflective, which is excellent for setting white balance; low enough that there's no danger of clipping (unless the photo is hopelessly overexposed), yet high enough that noise isn't a factor. You can set it in the scene and get a nice sampling of each of the light sources by direction (say, daylight coming from the right and fluorescent coming from the left, blended roughly equally in the middle); or, you can put it over the lens and get a good whole-scene sampling suitable for an in-camera custom white balance.
If you don't have a spectrally-flat target (and note that many common "white" objects such as shirts and paper and the like are far from white), your next best bet is to boost the saturation in post-processing to 100%, fiddle with the white balance until it looks as neutral and un-saturated as possible, and then return the saturation to wherever you want it for that picture. It's much easier to tell when the white balance is off when the picture is over-saturated.
The OP images look clean... but they have a funny blue cast on my monitor....
Are you planning to do anything other than sports? If not then it would be worth getting more specialist kit.
If you are planning to do other things then versatility needs to be factored in.
3 bodies are fine - means one can be repaired whilst the other two are being used.
I just sent both 1Ds for cleaning/service, the 1D4 will go on their return, by which time the 1DX should be here.
I can always fall back on the 10D/5Dc combo if needed
Jsut got hold of a 1dx for 8999 brand new, so I put up my 5d3 and TS 17 for sale, I have until wednesday to make it happen, fingers crossed!