Quick update:
I found 60Hz crossover for my L/R mains to be the sweet spot. I haven't played around yet with the center and surrounds. I'll give it go this weekend.
I also tried the 16hz tune (one port plugged), and it seemed to take out some "boom". It was subtle, but I think I like that sound profile.
I also got some noise isolation feet too. Should I re-run Audyssey or not worth the time?