Current favorite: humanscale freedom with headrest (1 year) Runner-up: Herman Miller Mirra (2 years) - I find the Mirra than the Aeron and more comfortable for

Current favorite: humanscale freedom with headrest (1 year) Runner-up: Herman Miller Mirra (2 years) - I find the Mirra than the Aeron and more comfortable for my body (2 years on the Aeron) - I've used various Steelcase models and liked them but not as much as the Mirra or Humanscale (~7 years on various Steelcase) - My issues tend to be caused by over exercising and I think the relaxed options with Humanscale are good for this.