Looking for a new home office chair

I found my work office manufacturer 'Herman Miller' and on their site http://store.hermanmiller.com/Products/Aeron-Chair, it goes for $869. On ebay found them for $600. I found a similar mesh chair (Realspace PRO™ Quantum Mesh Mid-Back Task Chair, 50 1/2"H x 29 1/2"W x 28"D, Black Frame, Black Fabric Item # 510830 ) Designed for intensive use 5+ hours per day at office depot on manager special and a coupon code that got me down to $210.
It is a future Father's day gift to myself. I hope it works out well.

They had a grey one which was already at $199 item #234750 but it was sold out and still on the website.