I recently sought out a new chair to replace my 25 yr old back breaker. I was going to get Herman Miller Aeron (touted as best in the world) but, after trying them side by side, I chose the Steelcase Leap. It's been a month and I don't know why the hell I waited so long. What a difference a chair can make! as important as any tool on the bench, my advice, don't scrimp.
Looks like a great chair. Does the seat get in the way of the engraving vise? My Herman Miller chair seat is just too large for bench work. Can you remove the arms on the Steelcase chair?
EDIT: I just tried my Herman Miller chair again and the seat is too large for my setup and I can't get the chair's back in close enough for lower back support. My Office Depot chair is a task chair which has a shorter seat and adjustable back which works much better for engraving. The Herman Miller is a superb desk chair though.