Alright folks, I bought my first projector and am toying around with screen sizes. However, I'm not sure whether I should go with spandex or blackout cloth for my screen. I have a $30 Amazon gift card so the screen material would only cost me $9 from Carls place. But I'm not sure which gives the superior picture. Any thoughts would be great. I have brownish painted walls and ceiling and total control of light. I'm using the Benq 1080ST. Thanks!