Further to suggestions offered, i am using since 2 years LG's data projector, it is too good and often i run for several hours a day that too non stop.
My suggestion will be go for Epson Projector X-02 or X 11 . Good Projector and very good in Service. X 11 will be the best choice in your budget as it also has HDMI. BenQ is useless projector dont go for it you will not enjoy the image quality.