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This is my wife's favorite office chair. The "Leap" by Steelcase has everything she needs.
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Then again, my favorite chair at this point is the "Think" chair, also by Steelcase. Both of these chairs can be a little pricey but you can look at that a couple ways.
Many of us have bought cheap chairs from the local office supply chain based on a two minute sit (if that long) and home it went. Most of us find that after a little while that new chair isn't as comfortable as we thought. A year or two later, out it goes and we start the search all over again.
The other option is to find a great chair, pay a fair price and keep it for 10-15 years, happy with it the whole time. To put this in perspective, if you spend $750 for a chair and keep it 10 years, that's $1.45 a week for a great sit!
Think about it.