If the room is the typical 18-20FT length and you want a traditional rear projector, then I say get a TV.
If the room is much longer, you can still mount the PJ on the ceiling.
Or you can get those ULTRA-SHORT-THROW PJ + Screen.
Introducing the LS800 Ultra Short Throw Laser Projection TV, an immersive display for home entertainment sports and gaming up to 120".
epson.com