Need help for the choice of CPU Intel

I have ordered today one aorus z390 xtreme but i need a hint for the CPU I7 9700k or i9 9900k.Ah i use my new pc only for gaming (35%) overclock (35%) and some video/photo editing amatorial (15%) and internet (15%), the rest of the hardware is antec hcg 1000 xtreme with seasonic gold base H500M from cooler master and for the custom loop i have thinked at alphacool or ek ram ddr4 rgb pro corsair i don't know if 3000/3200 or more what do you think?

Don’t take this the wrong way, but don’t you ever use a comma or finish a sentence with a dot ( . )?...

yeah sorry for my grammatical error but i am italian and what i am say errare umanum est!!!!