I'm looking to get a projector in the coming weeks, although at this time I don't need anything too high tech. I noticed in this weeks Best Buy ad they have a couple for under $800, an InFocus model and an Optoma. Are these brands reliable? Also, how good will the image be just projecting it on a wall? I might get a real screen but again, at this time it would be someone difficult since I'm moving into a new apartment.