Let your application decide the type of projector you wish to buy (LCD / DLP / LED).  LCD projectors are more suited for office applications, DLP projectors are good for home theatre & video applications. LED projectors can be used for home or office, they are low on brightness but are very light & ultra portable, they also come LED which have a with very high lamplife.
 
Picture
New breed of LED Projectors from Optoma & LG deliver excellent projection quality with adequate brightness for normal presentation or home theater applications.
Positive features like Light Weight, Ultra portability, High Lamplife, a whole lot of connectivity like USB, Memory card slot, HDMI, VGA with Audio adds to their flexibility. High wattage speakers for sound adds to the fun quotient.
Projectors to look out for Optoma ML500, Optoma PK320, LG HW300G