Uhhh.... the requirements for the game state a 32 mb video card bro...
Flight Simulator X
I think a 4670 or a 4830 could more then likely handle it. Ive never had a flight simulator lag on any of my PCs I wouldnt say they are that hardware intensive, Maybe im wrong.
As for the rest of the system im pretty sure it would handle just fine. a 4830 would run most newer FPS at decent graphic settings and 1650x1080 with playable frame rates, overclocked a little those things come to near 4850 performance.
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The Builders Hammer
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