sorry, forgot to mention. 7-800 USD. I don't think I'm gonna carry any old parts over from the old system other than peripherals like mouse/keyboard, monitor, speakers etc. All of my parts are super old (4.5 years old), and it's just not worth parting it when I could have another computer that I could give to my parents since the most intense thing they do is watch 720p movies that I download for them (which my old comp does very well).

I realize it's a pretty general question, but I'm looking for general answers. I know that this game is famous for its problems with hardware, and I just want to know what kind of parts I should avoid. For example, that game Saboteur won't even work on ATI cards. I just want to know what to avoid, what to get etc to maximize my performance on this game.