I got my chairs from theaterseatstore.com, but I would buy them from Roman (firstname.lastname@example.org here on the forums, but at rtheaters.com) They are Berkline Reno's but are also known as Lane #103. I've sat on them in my garage so far and they are quite comfy.
The screen is an AT (Acoustically Transparent) screen from SMX Cinema Solutions. (Their Cineweave HD material). The whole purpose of this material is for sound to pass through without problems.
You went with the SMX pre-built screen frame too? If so, why instead of building your own?