Ekorness Stressless has been in my sweet spot for the past 9 years. There are times that a little extra lumber support might be an improvement but mostly it is occupied for hours with excellent comfort.
What do you sit on?
As my system has improved I am spending more time listening but my "sweet spot" is not as comfortable as I would like. I'm looking at new chairs, recliners, etc. This is one topic I have not seen discussed on Audiogon. What kind of chair, perhaps what specific manufacturers are favored by experienced audiophiles? Maybe a little crowd sourcing in this area might turn up some overlooked gems in the way of listening room furniture.