I just spoke with a very knowledgeable and friendly rear projection screen tech guy at Draper, and he said the "high contrast tint" was only needed when using projectors with a poor contrast ratio. He said most people go without it these days because projectors have higher contrast ratios than before, and the neutral grey screen reproduces colors more naturally and is more efficient at transmitting light to the viewer. He said that for the 1.3 gain screen, which he recommended, your projector should be located behind the screen at a distance of 1.5 times the screen width. So for a 133 inch diagonal HDTV screen, you need 174 inches (14.5 feet) behind the screen unless you also use a mirror to fold the light path. Plus, you need to allow room for the depth of your projector.
By contrast, I have called Vutec a number of times in years past and never got a knowledgeable person on the phone to talk to. Their products may be very good, but they do not give out good technical advice over the phone or by email. I don't know why that is.
Are Draper screens as good or better than Stewart screens? I think Stewart screens are way more expensive, but does that make them better?