I'm pretty sure it uses the unreal engine... I know the final fantasy for xbox 360 and PS3 uses the unreal engine 3... I'm sure the the newest final fantasy for PC will be the same... I never got into final fantasy though, RPG's tend to give me a headache. I'm more of an FPS and RTS gamer...
Most games in the future will be built around the Unreal engine 3... so I personally would go with Nvidia... The only exception is if your a hardcore CS player, and Nvidia cards still run CS just fine...
