alright guys, hopefully the moment of truth here.... I measured in that spot as Markus and AlanP suggested. I confirmed I had it in the right place by running the sub-only graph again prior to audyssey. Attached is a comparison between my front corner position (red) and the position behind the couch along the wall (blue). To me, they don't look that much different surprisingly, but I could be wrong. I ran them at the same exact AVR settings and volume settings. Interestingly, audyssey set the trim to -10.5 in the position behind the couch, but it was set at -8 when running in the corner. so, i think this theoretically means I get a little more headroom behind the couch?
I don't like the 22hz dip on the blue graph because I don't want to miss out on the ultra low frequencies, and there's a dip at 65-70hz. I also don't like the placement as much as the front, but will definitely leave it here if it gives the best response. On the red graph, I still get the ringing at 50 hz it looks like on the waterfall, and then there's the dip at 55hz. I might be able to play with the PEQ or slightly move the position a few inches to see if I can tame the ringing/peak, if you think the corner graph looks best. I also did not get a chance to sit and do critical listening between the two positions yet.
What do you guys think? I'd like to know the reasoning behind your choice so I can learn what you guys are looking for in deciding. Thanks