If the official specs of the 6700k is going to have a 4.2 GHz turbo boost as factory default for 4-core loads like the presample mentioned in this article that will be great. I don't care about overclockability so I don't care how well they are going to overclock as I used my PC for work as well and need reliability and stability, and I want the fast stock speeds so 4.2 GHz on all cores stock would be great for me, as long as it does not throttle during full loads and does not overheat. I have an i7-4930k but I want faster ST performance. I just might switch to a 6700k when it releases or shortly after.
http://www.cpu-monkey.com/en/cpu-intel_core_i7_6700k-518
http://www.cpu-monkey.com/en/cpu-intel_core_i7_6700k-518