[zag]

you certainly dont need it but if you have all the other parts and dont mind spending the money, why not have 16GB of RAM alongside the haswell i5 processor. In the future you could turn it into a server running VMs or something like that. That said there might be better 16GB RAM that doesnt include a game (would you play the game or not?) for a cheaper price?

But yes you certainly dont "need" more than 4GB for your described usage... "want" on the other hand :p

Don't forget using 2 sticks of RAM will use more power.

I personally use 1 x 4gb stick.

OpenELEC uses less than 500mb