I have a fully-adjustable chair from Office Depot similar to this one for $350:
https://www.officedepot.com/a/products/448575/WorkPro-Quantu...
$450 for separate lumbar support: https://www.officedepot.com/a/products/9518879/WorkPro-12000...
$450 for separate lumbar support: https://www.officedepot.com/a/products/9518879/WorkPro-12000...
How long have you had it and how do you like it?
I'm surprised there isn't a modern/stylish chair that can compete with HM/Steelcase and hit the $400ish range. Maybe I just don't understand enough about the materials and manufacturing costs necessary, but seems like this should be doable -- and the deeper I research brands who try this (like Autonomous.ai), the more I read about the chairs being creaky, poppy, and sometimes uncomfortable.
A Casper/Purple/Saatva for office chairs seems ripe for this climate (WFH).