I have a room that is 14'10" wide 27' long with 9' 6" ceiling height, I am trying to decide which would be best the viewsonic is almost half the cost of the optoma but the optoma has 3d. It will be used for movies and gaming mostly. I would like to have a screen size or 120 to 130, the room is very dark. Is there that big of a difference between the two other than 3d to justify the big price jump? Thanks for any input I am new to this stuff.