Upgrading stock Ender 3

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I have done a few mods, filament guide, bearing and housing for leadscrew,fan guard, glass bed, new springs etc.
I am now at the stage, thinking about new main board and possibly control panel
I ask, control board, I will have no problem installing, what I have never done, is update or flash firmware !!
I see many boards out there, I think I am swayed to creality
I welcome anyones advice please