I spend quite a lot of time at my desk over the course of the week (and weekends) and find myself slouching even with chairs which have decent lumbar support. I have looked into the concept of a standing workstation before and although it's something that I would like to try in the future, I decided to go ahead with replacing my desk chair with an exercise ball as an initial step.
I am not the tallest so I decided to go ahead with the 65cm Trojan Burst Resistant option. I have spent about 3 hours working on it today and so far so good. I seem to be sitting more upright, moving around more and stretching a bit. As per other articles read and videos on YouTube hooking your ankles in under the front of the ball definitely helps.
Will see how the next few days go, but wont be getting rid of the chair just yet!