I requested samples by email, which were shipped 4/13. I also posed a few questions to Draper, to help me narrow my choices.
One of those involved the M1300 vs M2500. I am installing the 1500 lumen D-ILA. Interestingly, after asking about the two surfaces with my projector, the rep had the following response:
"I would suggest M1300 surface. Hotspotting may occur with the M2500, when using a projector with over 1000 ansi lumens."
Now, I will have a vertical offset to my screen (it's going to be mounted a bit higher than optimal), but thought I would pass this on to the collective, given all the discussion re the M2500 screens. Make of it what you will.
I was very pleased with the prompt and detailed responses, however. I recommend that if you have questions, fire away at the screen people in general -- they are extremely customer-focused and happy to answer questions.