While Marc does love his grease wrestling with skunks, I'd think that the missing wall would be much more of a problem due to reflections, or lack there of on one side of the room.
To be more clear, he's planning on setting up a 2 channel speaker rig, that is if I get off my butt and the finish his speakers that I started two years ago. I'm moving this project to the head of the line, and it will have some very unique and very awesome attributes. That really goes without saying though, as nothing Marc does is run of the mill.