The W500 performed very well in terms of most types of image noise. This is not surprising since there is an HQV tie-in. The BenQ uses HQV (Hollywood Quality Video) image circuitry, and I have been using the HQV test disk for looking at noise, for well more than a year now.
I would give the BenQ W500 a slight advantage over the DLP competition, in terms of motion artifacts. Noise on still images, is very good, better than typically found on DLP projectors, but that is generally true of LCD projectors. In watching about 5 hours of HDTV, and a close to 15 hours of DVD (mostly Blu-ray, but some SD-DVD, and HD-DVD), nothing ever "jumped out at me" indicating a problem. If there was a flaw, it was occasionally a touch slow, in handing motion artifacts, but you aren't likely to notice, unless looking for it.
Ok, time for a quick look at the Warranty, then the Summary section!