bryce,to answer this, you might give us a bit more informations what should happen with your documentary.
– which cam do you use for your shoots
– will it go to cinema
– will there be a BD
– what is your budget
– on what kind of system will it be edited
– will it be a PAL or NTSC-DVD
in general you could say: higher quality input will bring better quality in your output.
so you might go uncompressed 8bit or maybe apple pro res HQ or 444 depending on your workflow.
maybe you´ll have a offline/online HD-2K or 4K-edit with a big color-correction, so you might give us a bit more informations.
cheers
danny