The right speed color wheel can do a lot to get rid of the rainbow effect, and admittedly my W1070 is 2000 lumen, but it is as bright of a home projector as I've seen, it can be seen pretty well in a lit room, and I'm throwing around 140" - 150", and could easily see this going beyond 180" without looking shabby...
BTW, which anime convention are you referring to?