Codec choice has a lot to do with the intended audience. For YouTube or Vimeo, look under "H.264" and there are presets for both. Just make sure to set the frame rate to match your footage. What do you want to DO with the export? That will help determine the "best" codec to choose in each situation.
Safe Harbor Computers
Thank you, those presets will be useful.
The main use of my export is to play back on a standard Windows 7 PC. This is why I'm not too concerned about the file being quite large, even a few gig, as long as I can keep my 720p HD quality. But the 28GB file I original exported is just beyond way to big and doesn't play back smoothly.