One thing you have to be careful about -- some onboard video cards use the AGP slot, meaning you can't update the video card. I'm not sure about that model, but it's something you'll want to look into -- you might have to update the motherboard as well.
Heh, I just looked at the thread you posted -- looks like it has that issue. That sucks. :\ I wouldn't even buy a PCI video card, personally.