I shot my first concert with the 5D3 and 70-200 IS II last week. It was a relatively small venue with poor stage lighting.
I used AV mode, f/2.8, ISO 8000, and min shutter speed set to 125th. I was pretty happy with the shots I got using those settings.
I'm looking for the same advice on post processing. The noise cleans up fine, but I'm wondering how to go about setting white balance. Iccan't get a natural skin tone due to the colours of the stage lights, so how do I choose a temperature?