Seems like I broke mine when I was drunk last night. Thing is leaning one way now. Where is the best place to get a new one?
What is your budget for this chair?
If you spend a lot of time at your desk it is worth investing in a comfortable, functional chair: one that you can pump up and down, swivel, tilt back and forth, that has good seat and lumbar support, etc.
The kneeling chair (below) is nice in theory, but over the long term I don’t think you’ll find them very comfortable. In addition, although they tend to be on wheels, they are usually of a fixed height. I have used them extensively in the past and they get old real fast.
The Herman Miller Aeron Chair (below) is a great chair, but many people balk at the price.