Cool, man. Is Da-mat a higher contrast version? I've done a little browsing around on your behalf for both screen and player. Some people seem to really like the CinemaVision fabric, including one fellow who tried over 30 different fabric samples. However, surely the applications will differ, as well as PJ tech (he was using Sony SXRD).
That screen is 159", or slightly more than 75 sq ft, one of the standard Dalite sizes (and perhaps biggest). One thing to consider is how very heavy this might be, which leads to how you will mount it. My own screen was VERY heavy (also because HP is naturally heavy; emulsified glass), and it took three people to mount. I underestimated how much closer it had to be to floor, because I basically needed hooks that allowed double screws for this much weight, and well to accommodate these hooks, it had to come lower from ceiling. Just a word of warning.
Dalite is very respected, known for good build and reliability, as well as great CS. However, every once in a while people do complain about wrinkling or cupping at the corners, and the couple/few examples I read were all after three years. You hear sometimes that Dalite still helps out, and other times where they didn't help (outside of warranty period).
I don't mean to sidetrack you, but just another thing to learn about if only for protection of screen.... SMX microperfed AT screens can now be fitted with these manually placed masking panels. This is very nice for many people who balk at the extremely high prices of automated masking systems. Anyways, if you did get that screen with panels, you could just cover all or almost all of the screen (maybe they can custom cut). There was discussion is they would work for other screens, and it appears they won't, and so people hope that other manufacturers like Carada or Dalite will follow suit. Just FYI, I think you're on a good track . . .
but where is the center speaker going? Do not put it on the floor. If it MUST go on the floor, I would put acoustic treatments there, and beefy ones, but then the center will too raised perhaps. OTOH, some super expensive centers might have been designed to work ok on the floor, I think of B&Ws top of the line ($$$$) but I'm not sure about that really.
http://www.smxscreen.com/pro-panels-masking.html
Whatever you choose, read carefully. Some only are region free on DVD, even as bluray player, only a small handful made originally as region free (others modified).
These two can be code hacked to be region free, if they don't come that way already?
-LG BH200
-Momitsu BDP-899
http://www.momitsu.com/bdp_899.html
Or choose BDP of choice, and use a mod kit from the following company. Even an AVS mod gave their performance the thumbs up.
http://www.jvbdigital.nl/jvb.asp