Not an answer, but I did discover kneeling chairs, because I am also in the market for a new chair. I’d try one with back support, but none of the reviews of the products on amazon compel me to make any purchases.
http://www.amazon.com/Office-Star-Ergonomically-Designed-Casters/dp/B002L15NSK/ref=nosim?tag=vglnk-c319-20
http://www.ncbi.nlm.nih.gov/pubmed/18810008
Not an answer, but I did discover kneeling chairs, because I am also in the market for a new chair. I’d try one with back support, but none of the reviews of the products on amazon compel me to make any purchases.
http://www.amazon.com/Office-Star-Ergonomically-Designed-Casters/dp/B002L15NSK/ref=nosim?tag=vglnk-c319-20
http://www.ncbi.nlm.nih.gov/pubmed/18810008