[Rover]

I tried using a 5D Mark II recently and did not like it. After years and years of using 1D series cameras, it feels glacially slow, especially with regards to AF. I did not like the very limited spread of focus points either - they practically only cover the inner ninth of a 3x3 grid. If the 6D is the same in these regards, at least it has a newer / better sensor, and longer service life since it's still a current model. It has a little faster frame rate, to boot (4.5 fps vs. 3.5 fps I think?) So I'd take the 6D no contest, and just ignore the lens.