So I pulled the pin on a SecretLab Titan. $500 with shipping all said and done with the BF/CM sale which isn't too bad for what's supposed to be a premium chair. I was never going to spend the money on a Herman Miller and considering I was pretty happy (and comfortable) with a Costco office chair I've had for 5+ years, I suspect I'll be fine.
I'll post back with thoughts/opinions once I've gotten it.
I think that looked like a pretty nice option. Look forward to hearing what you think.
The big reason I have an Aeron is because I got a demo show floor previous year model for $550. So that was a good deal. Warranty still intact too.