For standard definition video, you want to use the best connection you have on your display and sat box. They are listed in the following priority:
HDMI (limit to 20 or 30 feet for reliable signal)
Component Cables (3)red, green, blue
S Video
Composite (yellow)
For audio, you should run digital optical\coaxial if you have it. Run red, white analog if that is all you have.
Blue Jean Cables is supposed to be coming out with a dual HDMI cable good to 50feet any day now so check with them if that is what your equipment will support.(480i)