Upgrade advice needed for CPU.

My current configuration is
i5-3570k + Asus P8Z77 M Pro MoBo.
I’m looking to upgrade it and looking for some advice.
Is 6700k worth upgrading, would I see a considerable speed up? Should I wait for kaby Lake?
I have been researching it found some options also https://elitegamingcomputers.com/the-best-gaming-cpus
I’m a gamer and game developer.
Please suggest a CPU + MoBo Combo.
I’m looking for white build.
Thanks in advance.