I would be a customer for that chair. With office chairs, I always take the arms off if I can because it lets me play guitar/bass much more easier in front of my DAW.

I don't buy the kind where the arm is actually the support mechanism for the back of the chair as a result.

My favorite chair that I've ever sat in to play guitar was this one: http://www.kareproducts.com/spine-align-chair-p-4388.html

With the arms off of it of course.