HI,
I was selling these kind projectors a couple of month ago. You should look at the INFOCUS LP425ZV (800X600) or the LP435ZV (1024 X 768). They integrate the DLP technology from Texas Instruments. This technology is very reliable, instead of having 3 LCD panels, you have a microchip with mirrors (see ti.com for more infos). this chip is sealed, so no dust can go on the mirrors.

The Infocus are lightweight (6-7 lb), easy to use and very small. Also, they are bright (900 to 1000 ANSI Lumens). The prices vary form approx.6000.00 $ to 8500.00 $.

Do not hesitate to reply me if you need any further information's,

Christian Cote