I've got a little variance here on a few of the notes, but I already pretty much know where my major issues are. I'm actually breaking a FEW rules here in that I'm in a corner AND I use a sub. I have a somewhat treated room with some traps that I got from ATS Acoustics (great company for them BTW, realatively inexpensive and as effective as anything else made from these materials, I'd imagine - I think for a corner and 4 flat wall traps, all 2' x 4' by 2" deep, except the corner one, which is 4" deep, they were about $350 or so). Anyway, I used the tests from Ethan Winer's real traps site and between listening and running them back through a mic at the listening position and recording into a track in Sonar, I am able to hear and see where some of my low frequency issues are.
Here's the "graph" from within Sonar, showing the frequency "map" if you will - this covers from, I think, 20hz -> 300hz. You can see the bump in there around 125hz, if I remember right and some weakness below that, in the 40-60hz range,, again, if I remember right. But overall, considering how bad it was prior to treatment, this is great - and things sound good in here to me. Also, the maximum difference is somewhere around 8db, if I remember, and in most places is around 3-5db. Not perfect, but at least not a complete wreck. I stopped looking at it and just started playing again