"'Id like to see how the pixels would potentially hold up on the big screen."
The pixels from the 5D have held up to big screen viewing of lots of films.
I've shot projects with the 5D and GH3 and the GH3 looks much better, as pixels go, (not as an overall IQ judgement.)
Ironically my most recent film, an 8 minute short, was shot with both of those cameras and is being premiered at the cinema this Friday.
It will be my first chance to see both cameras on a big screen with an audience and I know they won't know the difference
Cool!
Would like to see the film if that's possible. Also let us know how it looked on the big screen and how the difference is between the camera's.