I'm going to be doing a HTR myself in the basement of my new house. I'm looking for a little advise on how to set up and construct for the best sound. The room finished is going to be 16x20 and will have a door to completely close off the room. The TV, front speakers, sub and all components will be hidden in the front wall. I planned on building a wood floor over the concrete of the basement. Doing this for a couple reasons. One so I can have the second row of seats on a riser, and second to allow me to install an in floor sub. I will be installing carpet in the room. I had planned on drywall in the room, walls and ceiling, but I'm afraid of what might happen to the sound with so many hard surfaces. Someone once told me that much of the problems associated with hard surface noise could be remedied by building walls crooked. Tip the back wall forward 1 or 2 degrees, and tipping the side walls back 1 or 2 degrees. Is there any truth to that? Another thought I had is to add columns to the room. I've seen this in some other HTRs, even ones some of the members have. Does this help break up the sound and avoid echoes? I have until Dec 2nd to get my plans finalized. Any suggestions would be appreciated.