I would harp on your Processor choice before your graphics card choice I tease No both are valid solutions. When you say static can you be a bit more descriptive visually what is going on with the screen.
Sounds like it is not recognizing the TV as a valid display device. Just out of curiouity is the TV HDCP enabled. If not, I'm not sure how this would effect bios screen but would prevent display under starting with Vista OS.