My school is planning to buy a whole new set of projectors for about 20 of our classrooms and are looking for advise on the projector: BenQ MP522ST: Specs: XGA native 2000 lumen 1000:1 contrast ratio Small, light and mobile: 5.3 lbs (2.4 kgs) Can anyone give me any advice or personal first hand experiences with this projector? Thank you all in advanced!