I will have to disagree again about render settings, sorry, lol!
All render prsets have their pros and cons, but they mostly have cons, imho.
For instance, the advanced effects quality slider at final is set to 46%, and above 50% for braodcast, this is way too high, 40% is more than enough and will cut render times. On the opposite, the AA settings for both presets are too low, and no preset use the texture AA and texture filtering options, wich are absolutely necessary to avoid flickering in the materials.
So you should always use your own render settings to lower the advanced effects quality, add texture AA and texture filtering to avoid flicker, choose your own AA settings, and also, get rid of unwanted features like motion blur or dof that broadcast uses by default, even if you don't want blur in your anim.
As for quicktime, I'm not saying the compression codec is bad, I'm just saying that it is already compressed, and that converting a mov file to an mpeg2 file will add more quality loss.
It is better to convert once, and only once. This goes for movies, photos and sound files alike.
Each time you convert or compress, you lose quality.