i will soon upgrade and build a new i7 system for FSX. i will go with the 920 cpu (oc to 3.5GHz) and the asus P6T with 6gb triple channel ram. i am currently using a 7800GT which i think i should replace, as well

now the question is which GPU to buy. i am planning on an evga GTX260 since that one is quite affordable ($160+tax). i could also buy the GTX280 for $250, but will i even get better performance with that one in FSX? the sim is cpu hungry, so i would not expect any better performance on the 280 compared to the 260. am i correct?