Hi, After thinking about it for months now ive decided to take the plunge and get a projector. My neighbour has recently bought a 4805 and it looks great to me. I have seen the rainbow effect, but it seems to be all but unnoticable when concentrating on/ watching a film. I dont know what screendoor effect is, but I havent noticed any other problems with it. Now I would like to try and find a bargin, so where is the cheapest 4805? Thanks, Clyde.