The build quality is just fine fpr amd and the fan situation is alleviated with a non reference such as the twin frozr models.
If you need cuda acceleration in your video work would be the main reason to go with nvidia over amd.
If not any resolutiom 1920x1080 and under you have the 5770,6770, 6850 and 6870 all covering the mid range.
Nvidia you have the 550ti, 460, and 560 covering their midrange. What is your budget and psu?