Wow, 150" @ 17' is big. Very much like front row seating at the cinema.

The other concern is whether your projector is bright enough to handle that size. Assuming your screen is 1.0 gain, a projector needs to be 1100 lumens to get you just above the recommended 16 foot lamberts brightness.

Gforce,
Mine Only 133" at 18ft, you think its too big?? 150" at 17ft, much too big, practically in your face..

Well... The bigger the merrier mah No lah, I still haven't mouted the projector up, but I can select 142" to 170" base on the calculation http://www.optomausa.com/distancecalculator.asp I will definitely select one that suit my viewing pleasure

Projection Distance: 17 ft (5.18 m)
Screen Diagonal: 142. - 170 in (360. - 431.8 cm)
Screen Width: 113. - 136 in (288. - 345.4 cm)
Screen Height: 85 - 102 in (216. - 259.1 cm)
Vertical Offset: 13.6 - 16.3 in (34.5 - 41.5 cm)

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Added on October 24, 2009, 7:37 amScreen width of 113" (9.4') seem just about right as I'm thinking to have my front speakers placing 2' from my side walls and 3' from my front walls initially and slowly adjusting it...

This post has been edited by geforce1999: Oct 24 2009, 07:37 AM

Which Optoma are you using?

Lowest range of 1080p projector HD20.

I plan to buy Optoma HD65 and 106" or 133" Draper screen in double storey living room (24' x 22'). seating distance around 16' from screen.

There are 3 glass sliding door and 3 panel glass windows in the living room.

If I close the curtain in the afternoon, can I still watch movie with this Optoma HD65? is the video quality acceptable?