[Ayreonaut]

You seem to have figured out how to fine tune your response.

For me, the final frontier is EQing for multiple listening positions. I think its the best way to mitigate all of the room resonances. My subjective conclusion is that you'll realize an improvement at the primary position when you've addressed resonances that aren't even apparant from the measurement at that position. You avoid falling into the trap of trying to compensate for dips that only exist at one seat. Simply measure from all of your useful chairs, view them together, and EQ for the average using good judgement. My two cents.