The Acer X11 has a maximum resolution of SVGA (800x600). That's 39% less resolution than a XGA (1024x768) data projector, which is the most frequently found resolution.
This projector's resolution (SVGA (800x600)) is actually the worst resolution amongst all 13000:1 contrast ratio multimedia projectors that came out around the same time as the X11.
Amongst comparable types of projector the best resolution is WXGA (1280x800).
We compared this projector to all the other multimedia projectors that have a resolution of SVGA (800x600) and we think because of it's better review score, the Benq MS504 ($308.99) is also worth considering.
If the resolution of this projector is too low for you then you might want to consider the DX346 (XGA (1024x768)), or the DX325 (XGA (1024x768)) both from Optoma or the Benq MX505 (XGA (1024x768)) which also has a higher rating.