I'm also going to be building a computer this summer. I have been planning to get the following graphics card:
Newegg.com - EVGA 256-P2-N615-TX GeForce 7600GT 256MB 128-bit GDDR3 PCI Express x16 Video Card - Retail
It's two dollars more after rebate and seems to have better clock and memory speeds. However, it doesn't have Directx 10 and I don't know about the pixel pipelines. I was wondering how the two would compare...
Also, I am planning to get this motherboard:
Newegg.com - GIGABYTE GA-M55SLI-S4 Socket AM2 NVIDIA nForce4 SLI ATX AMD Motherboard - Retail
It's three dollars more, but it is SLI compatible. It also doesn't have onboard video (is it really necessary?).
I'm still learning a lot so any advice is well appreciated.