New CPU and Video Card?

I am looking to upgrade my Video card and CPU (hopefully). I am not sure how to do it, but thats not why im here, i can find that all over the internet. what i need help with is finding out what would be the best purchase i can make without changing the rest of my computer. Here is what i have:


Motherboard:ASUS P5N-E SLI LGA 775 NVIDIA nForce 650i SLI (quad core conroe)
Memory: 4gb ddr2 667mhz

video: 8800 GTS 640mb PCI-E
CPU: intel core 2 duo e6600 2.4ghz (1066mhz front side bus)
Power:550W

let me know what you think

 

video: Nvidia GTX 260 or ATI 5770.

Not experienced with Intel, so Idk.

 

CPU- Newegg.com - Intel Core 2 Quad Q9650 3.0GHz 12MB L2 Cache LGA 775 95W Quad-Core Processor - Processors - Desktops
it is an Intel Core 2 Quad Q9650 3.0GHz 12MB L2 Cache LGA 775 95W Quad-Core Processor - Retail for about $330.
you can use any socket 775 CPU, and the above Quad core is the best.
Socket 775 is core 2 duo, core 2 quad, and some high end pentiums and celerons.

for more choices, try this page []Newegg.com - Computer Hardware,CPUs / Processors,Processors - Desktops,Intel,LGA 775. all of them should be compatable.

 

also, [http://asus.com/product.aspx?P_ID=KyHOsOKWujC2QguJ} has a cpu support list.

 

Sounds like a kick butt combo..