I've said it already, the X10 is not going to win awards for black level performance. It is so-so, in this regard compared to most other lower cost 1080p projectors. It's easily, and significantly surpassed by projectors like the Epson, Sanyo PLV-Z2000 (which I haven't been showing images of, since it is so different in brightness (much less bright), that few considering one, would seriously consider the other).
Fortunately, that seems to be about the only real weakness of the X10, when it comes to image quality! Shadow detail, is a completely different story.
InFocus X10: Shadow Detail Performance
it's just fantastic on shadow details. Actually it is even easier to spot the darkest of details than with the IN83, let alone anything else we've tested. Seems that, these days, projectors with so-so black levels tend to have especially great shadow detail resolving ability. This may be due to everything being a little brighter. Still, the details are there - in spades!
We'll start from this seriously overexposed image from Lord of the Rings. The thumbnails below are all from the same projector, and normally exposed. Click for a cropped much overexposed image, and look for the shadow details in the back right, you can see the mountains easily enough, but look and see what's below them. Also, look for the subtle colors that show at a few points in some of the buildings.