Not much unfortunately...  >:(  
Got married, new house, new job, not much time...  
The new room has the same dimensions as Steve's reference room, but OBs & HDTs which sounded good before (in old room) sound pretty bad in new room w/o treatment.  :'(
So, I still want to add absorbtion/diffusion units and get the room to baseline good w/ existing set-up before adding corner horns, and changing too many things @ once...  
Robert  :)