Hi Cam,
DLP displays do not have motion artifacts and they are capable of excellent video quality. Typically their shadow detail and blacks aren't quite as good as plasma, more on a par with LCD. They are capable of brilliant contrasty images that are very detailed.
The bulb-driven DLPs do generate rainbow effects, which are visible to a tiny minority of viewers and may prove annoying. The newer LED-driven DLPs do not use a spinning color wheel, and so should not have any visible rainbow effects--I couldn't see any in a Samsung demo, and I taught myself to see rainbow effects when I want to. The LED light source does fire sequentially, so in theory it could produce rainbow effects, but I didn't see any.
The other downside to DLP rear-projection images is that they get dimmer when viewed from extreme angles to either side and also from a standing position.
Regards,
Alan
