Well if the Aeron ends up not being for you, I would suggest trying a Mirra 2 or Embody. Those in my office who do not like the Aeron seem to regularly like those.
I have access to multiple Herman Miller chairs at work. My whole company is furnished with Herman Miller stuff. Some people love the Aeron, some people hate it, and that is true of all of the Herman Miller chairs. Embody is the one that works best for me.
Aeron was more or less completely...