Is the contrast ratio and ANSI effect one another? I was hoping to find a projector with about 1500 lumens. I have come across a good deel on a Marantz that only has 700 lumens but has a 2600:1 contrast ratio. Can someone tell me in short how each effects the picture? I know if you have a room with some ambient light you want the higher Lumens so the picture does not wash out correct? I think the contrast ratio relates to the visability of the screen door effect? Thanks for your help.