thats the same thing i have actually. it is currently overcloacked to 2200 speed though. i think it is time for an upgrade(for the both of us)
i decided on an xp2800+. 2.08GHz is pretty sweet. plus you can always OC it if you want!!
i am actually doing a complete upgrade/rebuild, so it will work nicely for me. the biggest differencec in games is obviously your video card. seeing as you have a 9800, you need not upgrade. fast/more RAM wouldnt hurt either.