upgrade my box????

Hey all,
Ive just started the multi thing. I am currently running 5 accounts and having a blast. Now to the question. What are your recomendations for upgrading my computer? Currently I have main toon on 22 inch screen at 1680x1050 video settings at low and the other 4 on a 19inch screen divided into 4 800x800 low settings. I manage 40 fps main and 20ish on slaves. Until I hit a city that is then drops to pure stutter. My computers specs:

CPU_Name: AMD Athlon(tm) 64 X2 Dual Core Processor 6000+
4 gigs DDR2 800mhz
Mobo Foxcom Nforce 590 Sli
video NVIDIA GeForce 8600 GTS 256mb x2
HD 250mb
microsoft windows vista home premium

Any suggestions would be greatly appreciated.
Thanks tons
epi

I'd recommend a 4-core upgrade. If you want to stick with AMD, go with the Phenom II cpu. Otherwise, the Intel i7 920 is great for bang-for-buck ratio. An upgrade like that will require a new motherboard (unless your board supports AM2 and you stay with AMD) and new ram if you go with the i7 920 (6gb will do nicely).

If those options are out of your price range, check if your motherboard supports 8gb memory and upgrade that aspect.

The video card would be my final recommendation, below the cpu and ram. Since, it is not a *horribly* outdated card... but outdated nontheless. Though, cost for improvement may meet or exceed the cost for improving ram (if not uprading the cpu as well).

That's about it. You may be wondering if SSD or velociraptors in raid 0 are worth it... but they are not. You have too many other areas for improvement that will yield much greater results with less money invested.

thanks for the reply vald. much appreciated.