Hey guys! i need help picking some components for upgrade my actual pc. Actually i have:

I5 6400

8gb ram 2133

Rx 480 4GB

CASE: Cooler Master - MasterBox 5

600wt thermaltek PSU

BUDGET: 800, 900us.

I like stream league of legends and cs go, i abuse of multitasking too, and light video editing. PD: I own pherip.. but if u can add a mechanical keyboard would be great.

Thanks !

EDIT: ADD more specs.