Years ago, DLP's were the first projectors to produce high contrast and dark blacks. Over the years, though, the advantage has been lost. Today, JVC's LCoS design seems to be the best for black level performance, but other LCoS brands don't fare as well.
It seems also that a couple of the 3LCD projectors, while still not up to the JVC RS25 and RS35, are able to produce slightly better blacks than the best DLP's I've reviewed of late. Still, most of those better LCD projectors and the best DLP's (all using dynamic irises), are in the same overall performance class (ultra-high contrast). While the Optoma can be beat, it does perform very nicely, and should rival the Planar PD8150, which to date, has had the best blacks of the DLP projectors.