Go for ati radeon hd 6670 ddr5, it costs you around 5000rs and runs almost all the latest games on good settings.
Get an HD6770 or HD7770. It runs demanding games like battlefield 3 and Skyrim on high (not Ultra, but still impressive nonetheless) and should run those games that you listed, on high settings without any problems. GTA4 is a terrible mess on PC though, you'd have to adjust the settings and patch the game to get good performance.
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.