One other piece of advice I would give you is to get a motherboard with onboard video that can be turned off in BIOS. That way, you can save money now, but expand the video with a sweet card later....if you choose.
Nah. Get a separate video card. If the video card goes bad, replacing it is a cinch. My onboard video card died and I had to by-pass it with an after-market replacement. And its better for the computer's CPU to have the graphics processing handled by a dedicated chip.