Digital Multimedia Projector Cheap Digital Projector And Speaker System?

Cheap Digital projector and speaker system? - digital multimedia projector

I am looking for a well made and a digital projector and a high-quality speaker system for multimedia sounds great, but not pay the high price. Does anyone know a cheap but thts gooood digital projector that can play a connection to my computer and my Mac or a DVD player to watch films projected on a wall? and must be less than $ 500 .. Why not a speaker system .. which must be less than $ 300. THANK YOU!