Huey and Jon,
For a Home Theater application, traditional glass beaded surfaces are not a good choice. The beads are too large and mixed with a fixed pixel device (LCD or DLP Projectors) the image will appear grainy from the close distance you will be viewing a screen in the Home Theater setting. Also if your projector is ceiling mounted Glass Beaded is not the screen of choice because it is retro-reflective which means that it directs the light back from where it came. What you should consider instead is a 1.5 gain screen like our Video Spectra 1.5. It gets it's gain from a different type of reflective material and is not retro-reflective.
Blake
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Blake