anything over 8gb ram is overkill in a desktop pc unless your rendering/editing huge video files etc.
is your monitor 2.5k/4k ?
could have easily got a gtx 1060 6gb if only using 1080HD and saved yourself about £140, my cpu is a i5 4570, bought back in 2013, no plans to change it at all, cant see the point for only a few more percent in performance.
mainly play FPS so mouse and keyboard are the only way to play them
also got the GRID and Dirt series, played with a xbox 360 controller