Man, I don't know what to say. lol. Do you beleive form follows function? The science of room correction and creating an environment condusive to recording a clean project is enough to make you take a nap. There's no way to know what the results will be with varied materials. You almost have to play Marco-Polo in the room where you want to record and work on it from there. You have outside noise, inside reflection, unknown equipment, ( no don't list it), and the player variable. If you're using a DAW such as Sonar, I'm an advocate of a totally dead room. Unless you've got booku bucks to spend on rooms and treatments. Any thing less than a dead room will show up on a recording.