Cool....You have the same type of ceiling I have...The No-Squeak I-Joists.
I thought about drywalling the ceiling, but with the amount of cables I have up there (all my whole house audio/video/automation), I think I'm going with a drop ceiling.
Nice job on the riser with couch. I've been toying with whether to go with a couch or more recliners on the 2nd row. I think I'm going with a couch so that I won't need the extra space for reclining, and I can put a bar behind the couch with some bar stools for overflow seating.
The DTS poster/plaque was purchased at dtsonline.com, and the dolby digital poster is from dolby.com. The THX poster was purchased from THX.com a couple years back, but the last time I checked, they don't sell any display items any longer. I spoke with someone there, and she confirmed that they do sell apparel, but they don't want people to imply that their home theaters are THX certified, since such a standard doesn't actually exist for home applications. So...the posters are apparently now a collector's item, even though that wasn't my intent back when I originally bought it.
If you have questions about where I got any of the other items, please let me know and I'll try to answer them.
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