Looks like 6D.
But you don't mention light? Are you going to be shooting indoors? Are you confident using flash?
No matter how usable the very high ISO shots under available light may be, you will frequently be better served with lower ISOs and flash.
It worries me a bit that a lot of folk see high iso as an excuse not to use fill flash, flash modelling etc. We are painting with light folks. A high ISO sensor may be your canvas, but it's light thats your brush. Directional, diffuse, catch, fill. Don't leave it to the room lights or your photos will be very flat, no matter how noise free.