First, don’t look for perfection. The best case scenario might be ten minutes of comfort at a time. Assemble a collection of inexpensive, lightweight seating pieces. Use a series of blocks, to adjust for height. When one option loses its comfort, replace it with another. Remember to move around (on your feet) periodically. This can get the blood flowing plus provide a mental break. Be open to experimenting and audition seating surfaces that seem counter-intuitive; these may just yield the best results. Isn’t that what you’re looking for?
Chair
I’ve been thoroughly bitten by the couch. My listening chair that is.
I’m forced to cut my listening sessions short due to lower back pain (chronic, result of an old injury). Looking to get something that would be comfortable enough to not aggravate the nerve in my tukhes and align properly with my speakers in a sweet spot.
Eames replica in leather? Ikea Poang? Anything else? What do you use?