What CPU would be needed to do this?

Hi
I'm wondering, what CPU would it take to run FSX - all sliders maxed (including traffic) - at LAX (default scenery) and have at least 20 FPS?
How about the scenario mentioned above, but in stereoscopic 3D? (NVIDIA 3D vision). Would that put a much larger load on the CPU?
I'm wondering, what CPU would it take to run FSX - all sliders maxed (including traffic) - at LAX (default scenery) and have at least 20 FPS?
How about the scenario mentioned above, but in stereoscopic 3D? (NVIDIA 3D vision). Would that put a much larger load on the CPU?