I've been following Oman's curved screen build and am up for the task. Although I haven't bought my projector, it will need to be entry level (<$2500). Adding an amorphic lens will be cost prohibitive. While I like the way a curved screen pulls you into the movie, I get the impression that a curved screen without an amorphic lens is a bad idea. Is an amorphic lens required for satisfactory results using a curved screen or will the standard lens be acceptable?