This would be a lot more accurately answered in a more relevant section, but I have a decent amount of knowledge and I can tell you that your current system CANNOT run Arma II on high settings. Battlefield 3 you will have playable FPS 20-26. But really, I suggest you post this in the PC section for recommendations on what upgrades to get.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.