I'm tempted by both the idea of getting nVidia's driver support for all major components (bye bye Via, Creative, Hercules, etc.), plus an amazing NIC. If I see one for <$170 I may have to get it, simply because a Shuttle AK31A + Audigy XGamer costs that much. I mean, as you said, the human ear can't hear much better than the integrated card can put out, and it uses minimal CPU cycles, so it's not like that would ever be upgraded. Plus if you build a system a while down the road, you can take whatever amazing video card is in there and put it in the new one, and let the old box rely on the integrated one. I'm waiting for some more NForce alternatives and reviews to trickle in before I build my system.
Me "I bought a TNT2 M64, the BIOS says its a Vanta"
IOMagic "Theyre the same card"
Me "Um, no"