The Baron said:
Price and IQ are a biggie, but since they seem to be pretty evenly matched this generation in those departments, I voted drivers. NVIDIA's drivers are still light years beyond ATI's drivers (ATI's drivers STILL DON'T HAVE APP PROFILES)... and they work under Linux, Big plus.
Funny thing? It came down to the same thing for me and I went ATi for drivers.
On linux you are correct from my understanding, but I don't use linux yet so I don't know; but I do know when to expect the next set of Catalysts and their fixes/improvements....on the nVidia side it's just too bloody unpredictable for me.
Besides, I just don't trust them on drivers and I really think ATi is actually ahead on the D3D side of things.