Dalite Hi-Power 2.8 gain 92x52" with ceiling-mounted CRT. Normally this isn't a recommended surface for these conditions, but I have a low (7ft.) ceiling in my basement HT and the viewing level is 44", almost past the centerline of the screen. Since the screen is retro-reflective the brightness uniformity is amazing, especially after Guy Kuo's masking tweak. The max. off-axis for any seat is 20 deg. vert. and horiz. to any point on the screen. The great part about this screen is that even outside of its 25 deg. cone it is at least 1.0 gain due to its unique microfine bead structure.