Upgrade worth it?

[Doward]

Current specs:

2.6c (HT - s478) Northwood
Asrock P4S55FX+
512Mb (2x256) DDR Wintec AmpX PC4000
Zalman Cu7000 cooler
ATI Radeon 9800SE (128Mb) unlocked the other 4 pipes, and overclocked to 360/340.

I'm wondering if the following would be a good upgrade:

AMD Venice Core A64 3000+ (s939)
Albatron K8SLi Socket 939 NVIDIA nForce4 SLI
Geil Ultra 1GB (2x512) 184-Pin DDR500 (PC4000)
GIGABYTE GV-NX68256D Geforce 6800 256MB DDR PCI Express x16

Upgrade cost: $668.26. I'm thinking of doing it middle of September. (anything good coming out in the next month I should be aware of??)

Reasons:
Gaming, generally everything. Can also still sell my current mobo/cpu/video card/ram for a decent price, to help re-coup the losses
s939 seems to be here for a while - will make it easier to upgrade later.
Also thinking that the plain jane 6800 will be a good jump over my 9800, not to mention if I can unlock the other 4 pipes + overclocking. SLI is always an option, as well.

I may hold out for ATI's crossfire setup. Still undecided. I'm looking to upgrade my current rig for a good price, and have the ability to upgrade again later - WITHOUT changing EVERYTHING.

Comments?

 

[TheMostWantedPolishTwin]

looks pretty good to me... CPU wise it won't be a huge difference, but gaming performance will certainly improve... so if you have too much money then go ahead

 

[Doward]

Well, what CPU might you guys recommend?

*EDIT*

I wonder if the 4200+ X2 would be worth it in a month....