pc lay out for trainner

hi every one i just got some qestions about pc lay out.i dont know much about them so i need some help
at the moment i have
1 pc intel core 2cpu 2.13
with an ati 1550 old grafics card
i have on problemes with the pc but i am buildind A twin trainner sim
witch will only run fsx and some addons and internet
i am making it only for that all computer experts are telling me thing like
1 quadrer core pc with nividia 9800 1 g and 2gram with alot of other thing
a price lets say 700 to 800 euros??? i am just asking somthing cheper like what i have at the moment with a better grafic card whont it work better??
every ones saying it will not i cant understand it!!!! can any one help with a nice cheep lay out because all my money is going to the ir and mep so i whant to keep it cheep any ideas?:(

FSX doesn't really benefit from the high end video cards. As long as you have a video card that supports DirectX 10 (if you are running Vista) and has at least 256MB I would put your money towards the fastest CPU you can afford. A faster CPU will give better performance but a faster video card may not.

Checkout Intel E8400 Core 2 duos. Those are 3.0 Ghz and very fast with a Nvidia 9600GT 512mb. Or if you want cheap Intel quads, you can check out Intel Q8200. You will need at least 2GB ddr2 mems to compliment those fast processors.