To give a bit of an update... When I posted above, I was still in the middle of the project and was just excited about addressing my new room's acoustics...
When I finished putting the pieces together on my Rives level 1 design, I was left with a 20db peak at 35hz, and a big suckout in between 50-80hz. I sent photos, and RTA plots to Rives audio, and expected some help to address the problems.
Instead of helping me fix the problem, they said either I can pay them more money for a Level 2, or I am on my own.
I thought the whole idea was that their software identifies the room's acoustic problems, and their designs are supposed to fix them... it seems at leas for me this is not the case, and now, I have to agree with Mes. They (he) didn't even attempt to help me figure out how to solve the problem.
And oh, by the way. Rives, you may have wanted to mention that the way that I can get even a somewhat flat (+/- 6db) bass response is to use a pair of monitors crossed over around 80hz, and to place a sub behind the listening chair. It took a bit of time and work to figure that one out.
I've since had my local dealer come in, and we moved/added some treatments, and improved things quite a bit.