I was not bowled over by the Razer Enki the first time I sat in it. Quite the opposite, in fact: My back, as it is wont to do, hurt for the first hour, and I wasn't awash in comfort as I often am when I sit in a nice-looking new chair. But I soon grew accustomed to its feel and, hours later, I was struck by the fact that I wasn't aching from a day spent mostly stationary. And that's come to be my daily experience, minus the back pain--those initial moments in the chair aren't overwhelmingly...