Secretlab makes two other versions of this chair, aside from Omega: The "Throne" series is built for kids and smaller folks, while the "Titan" series is built with taller people in mind.
This chart from Secretlab can help you find the right chair based on your height.
After using the Secretlab Omega on a regular basis, I can't imagine going back to a regular office chair.
I don't know why I didn't consider a gaming chair sooner.
The Omega chair has everything you'd want in a long-term chair. I notice I've been less tired and more focused when sitting at my desk, and I find myself slouching less often, too. It fits like a glove. The Omega chair is easily the most comfortable chair I've ever sat on.
If you're in the market for a new office chair, unless you need to adhere to a certain style or status quo, I'd highly suggest looking outside the realm of office chairs and exploring a gaming chair instead. And I can't recommend Secretlab's Omega chair enough, especially as a starting point. Your back will thank you.