Hope you are well. Yes, those Rane THX EQs are very nice, I have looked at them.
As far as the software, I borrowed a spectrum analyzer from a friend to look at the frequency response, the M2i's are very flat except at 3.7kHz there was a peak that was much higher than the rest, the best I could do with my EQ was adjust the 4kHz center band frequency. That adjustment adjusted that peak downward and now they are almost perfectly flat in my room. Quite amazing design on the M2i to be so flat with only a minor peak, except that peak is at a frequency that the human ear is very sensitive to.
Thank you for all the replies, and suggestions.