The CP-WX8255A supports a maximum resolution of 1920 x 1200 (WUXGA). That's 20% more resolution than a 1600 x 1200 (UXGA) projector, which is the most frequently found resolution supported by projectors of this type and age.
A 1920 x 1200 (WUXGA) graphics resolution is in fact the best supported resolution across all comparable spec projectors that were released more than two years ago.
Across comparable types of projector the worst supported resolution is 640 x 480 (VGA).
Projectors with a higher resolution that might also be worth looking at include the Canon SX-6000 (1024 x 768 (XGA)|1280 x 1024 (SXGA)|1280 x 768 (WXGA)|1400 x 1050 (SXGA+)|1440 x 900 (WXGA+)|1600 x 1200 (UXGA)|1680 x 1050 (WSXGA+)|640 x 480 (VGA)|800 x 600 (SVGA)).