To be fair to DLPs, the color wheel speeds have increased considerably, which has reduced the significance of the rainbow effect. Even still, it is worth attempting to demo a DLP unit prior to purchase....if you go that route. I have an X1, which has a 1X color wheel and the rainbows don't bother me. I sometimes see them depending on the source material, but it's not a regular occurance and it isn't really a big deal to me. Given a 3X or 4X color wheel, I doubt there would even be an issue.