Spoken like someone who has never touched a 6D. This may be getting a bit repetitive, but I put my 6D's AI-Servo AF up against that of the 7D. In case you are wondering, I owned both at the same time. The 6D is significantly more responsive than the 7D. The limitation of the 6D is: center point only. The peripheral points on the 6D just suck at AI-Servo: too few, and too far apart. The AF of the 7D is way more configurable. If you can keep the center point on target, the 6D is the better choice. The 6D is not the best choice for moving targets. Neither is it a slouch.
I have 15,000 shots on my 6D. I couldn't agree with you more. Which is why I bought a 1DIII.
Gotta agree with both of you. As a matter of fact, I find myself agreeing with the two of you, more and more. I'm beginning to tire more and more hearing about how wonderful the 5DIII is. I'm starting to see the 5DIII as a jack of all trades, master of non. Hearing about the 5DIII on a daily basis makes me wonder why Canon even bothers to make any other cameras. Anyway, dollar for dollar, the 6D offers substantially more then the 5DIII. Any one that has owned one, knows. The 5DIII, while being a great camera, is not the answer for everyone. Hearing some people giving people advise to save their money and buy a 5DIII, especially when someone asks help in selecting between two totally different camera, which happens here a lot, is not doing justice to an OP, or anyone else. To the OP, rent both, and I'm sure you'll get the 6D, and have enough cash left over for a nice piece of glass.