OP, I did read through the enormous thread on this forum about eq settings, tried out a few of the settings recommended there and realized it all comes down to personal preferences/tastes.
I found myself using the other threads' recommended settings as a baseline, then adjusting from there to suit my own tastes. However, since different music sources and quality can have an affect on your eq settings, I still find myself adjusting on the fly.
For what it's worth, below is what i currently have set on my stereo. I like how it sounds but this is only my opinion. hope this helps. my M3 is a 2012 w/ factory upgraded system.