rom for Android box mxIII 4k

Hi i have a android box mxIII 4k that has the stock rom (kitkat), and i like to change for a more stable rom or a custom rom. I know that are some diferentes boards for this but i ill share the information that i have of my box.
Any help welll by apreciated .

http://prnt.sc/d1sa6x ; http://prnt.sc/d1sajz ; http://prnt.sc/d1sb2u ; http://prnt.sc/d1sbgf ; http://prnt.sc/d1sbt1 ; http://prnt.sc/d1sc4m ; http://prnt.sc/d1scg4