I'm still deciding between the 6D and 5D3, but whichever one I choose, I won't get the EF 24-105mm F/4L. In my opinion it's no match for Canon primes when it comes down to image quality.
Different tools for different jobs. Primes are nice, but sometimes I just want to cary a single multi-purpose lens when I'm out and about.
Besides the 24-105L is as a kit, a fraction of a line item purchase. Should be able to easily get the kit, and sell the lens and turn an effective instant profit