Thanks for your input, everyone!

I will definitely treat the room and then retest and reposition if necessary, however, as a starting point, could you please let me know which graph represents the optimal listening position currently, in an untreated room? I am simply trying to understand the FR graphs so I know what to look for in terms of problem areas. I realize that the graphs will most likely change once the room is treated, but for future reference, would you be able to tell me why, for instance, graph 61 is "better" than graph 79? Or is it not?

For example, is it less troublesome to have a larger peak in the 84Hz region, but have much smaller peaks between 147-167Hz (graph 61), OR would you "prefer" to have a much smaller peak in the 84Hz area, but have larger peaks around 149Hz and 165Hz? Hypothetically speaking, if the room was treated, and changing listening positions yielded these graphs, which one would represent a more ideal location? I don't know if I am making myself clear enough, but basically what I'm trying to determine is which of these graphs shows the least worst listening location (and why), regardless of whether the room is treated or not, simply based on the graph data.

Thanks for your patience and assistance once again!