Want to drop some info here, not related to your question since it's still out of your price range, but just for others who might be browsing, since I see HM chairs come up a lot in this thread and the other one.

A lot of these fancy ergo chairs work similar to other furniture and use a network of dealers. This is important, because dealers often sell for way less than MSRP, especially when they're buying for clients making big offers for office buildings buildouts. Some dealers can get you a great price by basically adding your chair to a big order for another client. I wanted a HM Embody and talked to 3 dealers in my area. One of them was able to get me the chair for about $1000, and this was also customized with the fabric that I wanted. Really shows the huge markup that MSRP is on this kind of item. Dealers are sometimes also willing to give you a loaner so you can try the chair at home before you buy.