Those in the market for a business / education-minded projector certainly aren't hurting for options these days, but if you somehow still haven't found one to your liking, you may want to consider one of these new models from Toshiba and Viewsonic. At about four pounds apiece, they're reasonably portable, and pack the same WXGA resolution along with some other similar specs across the board, including a 600:1 contrast ratio and 2,220 ANSI lumens on the Toshiba TLP-WX1000U, and a 500:1 contrast ratio and 2,000 lumens on the Viewsonic PJ359w. The Viewsonic also adds HDMI 1.3 connectivity to the mix, not to mention a short-throw lens, though you'll have to decide for yourself if that's worth the higher $1,299 list price or not, compared to just $959 for the Toshiba.

Read - Toshiba TLP-WX1000U
Read - Viewsonic PJ359w