To those who have this combo, with the high iso capability of the 6D, did you find you needed lenses faster than f/2.8? I know that f/1.4 gets you other things like thinner DOF, etc., so there may be other reasons to get a faster lens.
And if so, what would be a good lens to get? 50/1.4 is relatively inexpensive, 35/2 is not much faster than the 24-70 but has IS, 35L is super expensive and the Siggy 35/1.4, well... I am hot and cold on this lens. One day it looks spectacular, but the next, I think that paying $900 to get a lens that can't focus is just BS in my book (others may be willing to put up with it, but come on, really).