Ok, no joy, so I'll modify the question and hopefully get some feedback.
I'm currently thinking I will go with a 120" wide (~130' diagonal) 2.35 CIH screen.
I want to go acoustically transparent and have a motorized masking system.
Does anyone have a feel for pricing (ballpark is fine) for the various players: Dalite, Stewart, SMX and others?
Also, any add on acoustically transparent motorized masking systems, or do I need to get one from the vendor I get the screen from?