Oh, and here's one more, since I've replaced some of the ceiling tiles above the theater area. I only bought one set of 20 because I didn't know how they would look, but I'm happy enough with them that I'll get some more and expand the coverage. They're the 1" thick fiberglass ones on Amazon.com. There are probably better options out there, but in the searching I was doing, I wasn't finding them. Do you think I should get some 2x2 sound diffuser panels as well and mix them in? I probably don't want absorptive panels over the entire area, right?