Are you just assuming the light will cause distractions, have you tested it? My M80's sit right below my screen, granted they are black but have a shiny surface. My previous M60's were mansfield beach, again never had an issue. You normally will have your projector in the low light setting, assuming you have light controlled room. I guess I would test it first to see if you actually have a problem.
Anthem AVM60 Outlaw 7700 Emotiva A500 Epson 5040UB