So have you done any more research and come up with a few models that might work for you. Some of us forgot about you and got sidetracked, sorry about that.
Guys, would all the current crop of LED's have the same problem of RBE for him. I am sensitive to RBE but it seems like djbclark is "super sensitive". I wonder if the 700 lumen aspect of the pa75u was too bright, as experiement maybe put the PJ on lowest brightness setting or change the screen type. Was it showing on just wall or screen and type of screen. Sometimes changing stuff like that can help, something to experiment with.