I seem to be in the same situation as OP.
I am by no means a professional. This is only a hobby. I was looking into getting the 5DMKIII until Canon announced the 6D. But what was disappointing about the 6D was the 11-point AF system, whereas the new 5D has 64. Huge difference, no? Or does that have to do with the AI Servo? I am looking to upgrade to a full frame and these two are the only ones within my budget.
A lot of my shooting consist of action shots, portraits, and indoor/low light photography. The newer 6D should be fast enough, correct?