I have an Aeron at home - great chair. I have very bad lower back issues (arthritic deterioration due to significant vitamin D and nutritional deficiency; I have cystic fibrosis) and can't sit on any kind of surface for long. I can sit in the Aeron for 8 hours plus with no issues. My new one was $1200 but I bought one at a used furniture store for the office - honestly can't tell the difference. Pretty sure I spent around $400-500.
