My kids are taking over my Athlon64 3000 with a 6600GT, time to build a new rig. Anyone have any opinions on the dual core Athlon64 and how N2003 plays on it?

Right now I'm planning on a Socket 939 Athlon X2 4600 Manchester with a MSI 7600GT.

I got a DELL XPS400 customized a bit for around $1600 and am able to push N2K3 as high as it will go and still run around 90+ fps. Which makes losing much more visually satisfying.

General specs with N2k3 in mind

Intel 3.2 DC
800 mb fsb MOBO w/2gb ram
512 mb NVIDIA PCI EXPRESS
SB 3D audio
250gb HD 10k rpm
etc...