White screen or green screen question

hi
i have a series of interviews coming up...will shoot 1080.  I like the nice clean look of white for the background. Question is whether to shoot with white backdrop or green screen and key white in post.  Here is my issue: I want to use part of the space (framing screen right) for bullet points, graphics, etc. but i also would like to achieve this look at 2:40 into the video ( http://www.youtube.com/watch?v=yRK5QVEE8Ng) Clearly, a green screen was used here. I am  wondering if I shot against white could i just use the luma and key out my white background, create my effect with white and moving video then key it back in? Thanks.

Here's my 2 centimes, FWIW.  luma and chroma keys both have plusses and minuses.  Green screen will potentially give you the cleanest key if you follow a few "rules" while shooting.  It's a huge challenge to do good green screen:  large enough set so that you can light the screen absolutely differently than the talent.  You're really lighting two sets-- the talent and the screen.  you ought to be able to turn one off without affecting the other.  You'll need enough distance to avoid bounceback onto the talent. or a magenta backlight to minimize the bounce.  Fly-away hair is another issue-- paste it down.  That said, a well shot greenscreen is a joy in post.
A luma key is quick and easy-- IF the subject cooperates and doesn't have any highlights that might get blown off.  It's not good for people to have holes in their foreheads, etc.
I'd go green with a good shooter and proper lighting.

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