New AoC System opinions please

Right now I have...

Processor: AMD Athlon 64 Processor 3000+ MMX 3DNOW 1.8GHz

Video Card: e-GeForce 7900 GTX 512mb

Motherboard: Asus A8N-SLI Deluxe Motherboard

Ram: Kingston Hyper X 1GBx2 (2GB total) PC3200

OS: Windows XP Pro 32bit



I run AoC at garbage speeds, around 10fps and below. WoW even lags at times on max settings.
I have planned an upgrade, and read as many threads as possible to educate this upgrade.
I am wanting to save money, so I figure I can re-use my 7900GTX for now.
My main concerns are: Will the 7900GTX produce good results still? and is my motherboard choice appropriate? I'm wanting max, or near max performance in AoC.




TO-BE PURCHASED SYSTEM

Processor: Core™2 Duo Processor E8400 3.00GHz w/ 6MB Cache

Motherboard: Force 780i SLI w/ DualDDR2 1200, 7.1 Audio, Dual GB Lan, 1394, PCI-E 2.0, 3-Way SLI

Ram: 4GB PC2-8500 Reaper HPC 4GB Edition Dual Channel DDR2 Kit (2 x 2GB)

OS: Windows Vista Home Premium x64 (64-bit) DVD w/ SP1, OEM, 1-Pack



I know the motherboard is SLI and I am running a single card. I chose this board because of its ability to make use of very fast DDR2 ram, its ability to upgrade to quad core someday when it is utilized better for gaming, and for when I replace my 7900GTX (depending on your feedback, maybe I will when i buy this system) with a better single card, or double card SLI setup.

I am using a 2 month old 600W OCZ PSU that I hope to use with both systems (If you recomend running 2-3 cards in SLI mode, will this support them?)

Thank you for reading

I WANT to run it at 1600x1200

I HAVE it at 1024x720

(those are AoC resolutions)


So, are the parts a good match? I kinda wanna go out tonight for em but not sure