We'll see, they both still have some time before release. And I'm sure the NV will run toasty, most of their recent upper-end cards have, but when they are rated for 100+ C, I'm sure they'll implement enough cooling to get the job done! I'm sure the 2950 will do great also, and I do hope it has a 2 slot cooler, hopefully with a more silent fan that can still pump some decent CFM. Again, time will tell, I'm looking forward to both and will end up buying one or the other.
But since my old 9600pro days, I've had an 850, and this 1950, is the 2950 in my future? Maybe...maybe not.