I am building a New Game PC to fly CFS2 and other flight sims. on. Here are the stats up to this point. I have an Intel core 2Quad 2.5Gz CPU which I intend to replace but need your help deciding what to replace it with. Here is what I have done up to this point. I have 4 gb of ram one 7200rpm hard drive and an Nvidio GT640 With 2 gbs of ram. Can you give me some ideas on the Video card and the CPU? It is not to late to replace the video card if needed and put what I paid for it toward another card but I have not gotten the new CPU yet. Need input. THANKS