Best Codec? (for import)

I’ve got a client that wants to know what codec would be best for me to use in compositing cg over his video. He wants to send it in the ProRes422 codec. I’m wandering if blender imports this well. If not what would be the best codec for this type of project. It’s very important that it is a very lossless format that I use, so I WOULD like to use ProRes422 if possible. I’m running Ubuntu Hardy and also have an XP machine, so my options are open. Please tell me if you have any ideas.

I cancelled my post, because the answer didn’t mach perfectly the question.