The current NV30 cards do have some other disadvantages: They take up two slots, and when the cooling fan fires up they are VERY LOUD. I'm not usually one to care about fan noise, but the NV30 does annoy me.
I am using an NV30 in my primary work system now, largely so I can test more of the rendering paths on one system, and because I feel Nvidia still has somewhat better driver quality (ATI continues to improve, though). For a typical consumer, I don't think the decision is at all clear cut at moment.
För er som inte vet använder sig DOOM3 av en modifierad OpenGL-API, och DOOM3 kommer förmodligen sätta standarden för prestandatestprogram i OpenGL i framtiden. Läs hela planen hos Bluewnews.