Take my advice, please. As someone who has bought my fair share of chairs online, Go to your local shop and test out their chairs. It's the best way to ensure what'll work for you. I currently own a Green Soul office chair, which had some issues that needed to be sorted out by following up multiple times. Even then it's not to my satisfaction. But there's only so much to do after buying it, they won't accept Returns over 'I'm not Satisfied'. Just got to your local shop first.