[zero_custom]

Hi all,
I've been looking into saving and building a computer for simulations and possibly rendering. I'm at the fork road as deciding a CPU very much decides the "future proving" of your system. I'm interested to hear people's thoughts and experiences with them or troubles / stability of overclocking or anything that I may not have experience with.
I've a few choices of CPUs but they all have their pros and cons using sites for comparison.

in no order
xeon E5-2680V3 ( 12 cores and has a clockspeed of 2.5GHz)
xeon E5-2667V3 ( 8 cores and has a higher 3.2GHz, cost the most)
i7 5960x (8 cores but it has a higher clockspeed of 3.0GHz)
i7 6700k ( 4 cores of highest clockspeed of 4.2Ghz and cost the least)

http://ark.intel.com/compare/83361,8...08,88195,82930

If there's a "better" CPU or one of the 4 I shouldn't get, or even a cpu I should wait for in the coming months. I'm all ears.