What would be best?

Just wondering what would be the best upgrade for around 1000 dollars can go over a little.
I have a
P4p800 asus board
P4 2.8 gig no HT
1 gig pc2100
ati 9600xt video
xp home edition
I no I need a new machine but funds want permit it right now I just want to play fs9 smoothly.
I only have AGP by the way
I have a
P4p800 asus board
P4 2.8 gig no HT
1 gig pc2100
ati 9600xt video
xp home edition
I no I need a new machine but funds want permit it right now I just want to play fs9 smoothly.
I only have AGP by the way