Have you thought about running dual Sony 4k projectors? Can this be done to deliver 3D4k and regular 4k on a 15' screen with ample brightness? Any thoughts on what outboard equipment might be needed to run a dual Sony 4k setup, aside from a HTPC? I take it you think the Sony 4k unit is the best available 2D projector on the market?
Also, were your Barco's modded to work in a home theater the way, say, Display Development does? I have never seen one of their modded Barco units but I have read that they are bright, with excellent picture quality. They also offer a single projector passive Dolby 3D upgrade but again I haven't seen it but heard it is great. I have always preferred passive 3D until I saw "Life of Pi." It was shown using active Expand (sp?) 3D glasses and it was off the charts wonderful. Not sure if the technology used in the cinema is available to home theater or not.
Anyway, thank you so much for taking the time to share your wealth of knowledge with us.