I have to second the Herman Miller Aeron Chair. Almost 2 years ago, I began working from home and I had a cheap(er) $200 chair. I have never had back problems before and I began having back and leg problems sitting in it all day.

I thought that I would spend around $500. There were many reviews in all of the chairs in that range that said they were good, but they weren't a Herman Miller.

After the sticker shock wore off, I tried one out and I wasn't impressed to be honest. I got one anyway, with lumbar support, because I have never seen a bad review.

Within days, my back and legs stopped hurting. There has not been a day of pain since I got the Herman Miller. It is sooo worth the price.