If you want your room to stay relatively cool, the new Fermi series GTX460-480 all idle around 50C. so stick with amd they idle around 40C.
Misinformed much? The GTX 460 is a GF104 and runs very cool, even compared to ATI cards.
It idles at about 35C... and loads cooler as well.
The GF100 chips (465/470/480) are very warm, yes they aren't for everyone. Different cards, different people.