I can only comment on my screen size, 80x45 (92" Diagonal). I have a Da-Lite Model B Deluxe with tensioning arm. The material I picked is Video Spectra which has 1.5 gain (compared to High Power's 2.8). I had read about Video Spectra notorious waves forming over time. But I still chose it because of the moderately high gain, the viewing cone (35-degrees) and finally because of the included tensioning arm.
So far, I am happy to report the screen is flatter than when it first arrived (3 days ago). By this I mean, when I first put it up I noticed a stretching effect whereby the top and bottom were perfectly flat. But on the sides I noticed it was a little loose and not as flat. After 3 days of having it permanently down, I can now say the screen is perfectly flat on all 4 sides.
I can't comment on the Video Spectra's performance yet, until I receive my hs51 back from Sony service center. But so far, I am very pleased with the shape the screen is in. Perfectly flat.
Model B Deluxe Video Spectra 1.5 80"x45": MSRP $177
Pretty cheap, I think, for something that looks like a Da-Lite Perm Wall screen MSRP $500.
So far, I am happy to report the screen is flatter than when it first arrived (3 days ago). By this I mean, when I first put it up I noticed a stretching effect whereby the top and bottom were perfectly flat. But on the sides I noticed it was a little loose and not as flat. After 3 days of having it permanently down, I can now say the screen is perfectly flat on all 4 sides.
I can't comment on the Video Spectra's performance yet, until I receive my hs51 back from Sony service center. But so far, I am very pleased with the shape the screen is in. Perfectly flat.
Model B Deluxe Video Spectra 1.5 80"x45": MSRP $177
Pretty cheap, I think, for something that looks like a Da-Lite Perm Wall screen MSRP $500.