Detailed specs and information on professional projectors:

 

Eiki Multimedia Projector (LC-X50M)

4500 Lumens
1100:1 Contrast Ratio
1280x1024 max resolution
HD Compatible: 720p, 1035i, 1080i

 

 

Sanyo Multimedia Projector (PLC-XP46)

Wide Angle Zoom Lens
4100 Lumens
800:1 Contrast Ratio
1280x1024 max resolution
HD Compatible: 720p, 1035i, 1080i

 

 

Sanyo Multimedia Projector (PLC-XT20)

Long Throw Zoom Lens
4000 Lumens
1000:1 Contrast Ratio
1280x1024 max resolution
HD Compatible: 720p, 1080i