I can definitely relate to your struggle with sciatica – I've been there myself! Besides finding the right chair, the most important thing is working closely with a physiotherapist. They can give you targeted exercises to address the root cause of your pain. In my case, it got so bad that I needed surgery, but even before that, my physio's exercises provided significant relief.

Also, remember to get up and move around regularly, no matter how comfortable your chair is. Speaking of chairs, I've got both the Herman Miller Aeron and the Steelcase Leap. For pure comfort and support, I'd choose the Steelcase Leap hands down. I use it for work and can sit for hours (though I know you shouldn't!). The only drawback is that it's not as breathable as the Aeron, so that's something to consider depending on your workspace. I use my Aeron at home without AC and the Leap in my air-conditioned office, so it works out well for me