I did a quick search today to make sure that the 83% rule I was trying was correct. It turns out that I actually have it backwards. The distance to my seating position is 83% the width of my speakers. The actual way to use this rule is speaker-to-speaker distance = 0.83 x speaker-to-listener distance. Any correlation that the way I was using it worked? I may try the proper way, but this will mean that I have to move my rack over to the side wall. This is something else Jim Smith suggests, but it certainly doesn't have eye appeal.