first , let I explain my set up . I purchase this projector for the great room in my new home , which I move into in December 2010 . I have it ceiling mount and have a hdmus and power supply build into the ceiling , so I would not have any wire hang down . I use the projector for DirecTV -lrb- HD -rrb- , Blu Ray movie , my karaoke player , and my Wii . I have two HDMI switch , which allow I to go back and forth between the projector and my Samsung plasma tv . I be use this projector with a ceiling-mounted , 80-inch screen -lrb- also purchase via Amazon -rrb- . while I do not use the projector as my primary tv , I do use it when I have company over or want to watch a movie . it could easily be one 's primary television , but the picture be not as clear as that on my plasma tv . obviously , the picture be better at night than during the day , but it be bright enough that it can be use during the day . I have a Super Bowl party -lrb- the game start at 4:30 here -rrb- , and everybody comment on how cool it be to watch the game on the projector . I do not get any complaint about the picture . I initially think the projector could project up to 300 inch . I be not sure where I get that . it be possible I get confuse due to the ton of projector I be research at one time . there be no way -lrb- that I have find -rrb- to increase the picture size . it be about 80 inch ; it fill up my 80-inch projector screen just fine . the audio have not be a problem for I . I have ceiling-mounted speaker as part of my home theater system , so I would not have any need to use the unit 's built-in speaker . overall I be happy with the projector . I may move it into my bedroom and upgrade to something with a higher resolution that be a little bit brighter , but for the price this be a great deal . I have the coolest home theater setup on my block , and my friend love to come over for movie and karaoke night . what more could I ask for ?