Thought I should give my experience so far:
Went with a Steelcase Leap (refurbished so much cheaper and nothing really wrong with it) Pretty comfy for the last year. Had a hacked on headrest, see:
But the headrest pushes my head to far forward so not really comfy long term and hard to use it when leaning back as too much weight makes it pop off (not actually screwed onto chair) I don’t want the headrest when sitting up straight, just so when I lean back and relax I don’t have to hold my head up.
Tried a herman miller aeron chair but for me its not as comfy. And when my legs are a bit sore from working out its even worse while my leap works out great. Have to say the way the front of the seat can flex down a bit to have less pressure on the front edge can be nice.
Too many chairs, especially game chairs is the way they push your shoulders forward. Not bad short term, but I find its nice how the back of the leap around my shoulders is flexible. The Aeron chair and gaming chairs make it so a hunched position is the easy position to be in which doesn’t seem like good posture.
I did get to try a Herman Miller Embody. It seemed it might be good (hard to say in a few minutes) but not significantly better than the leap. no refurbs at the time so twice the price of the leap which made it not worth it.
Don’t regret getting the Leap with rollerblade wheels. Would be nice to have a built in seat heater as I get cold easy in the winter and that would use way less energy than turning up the hvac but my seat cover does that well enough.
Also use a Apex Pro standing desk (https://desk.haus/) with a home depot butcherblock top and a Fluidstance Level balance board https://fluidstance.com/ Staying active with a standing desk