After I relocated my sub to the corner of my room the uncorrected response looked like the plot below. I had gained 4dB in the lowest frequencies and was quite happy.
Uncorrected at Seat 1 
After applying the necessary filters I managed to get this curve at the primary listening position. Looks pretty nice huh?
Original Correction at Seat 1 
But I could tell there were problems in other seats in the room and so I measured four listening positions to find out what was going on. This was with the original correction designed for seat 1. Sure enough, there was a huge peak in some of the other positions. Yuck.
Original Correction Checked at All Seats 
This peak had to be brought in check even though it apperas that my "primary lisening position" is in a null. Comprimises are necessary if you want everyone to be able to enjoy the sound. I think that a valley at one position is prefereable to a peak at another since an exaggeration sounds much more pronounced than a leanness. I settled on a comprimise that leaves just a little extra energy in a couple of seats, and a bit of a dip in the other two, but it still sounds very good everywhere.
Final Correction at All Seats 