Yeah, Office Depot [actually Office Max is a bit better, IMO] is an ABSOLUTE no brainer on Black Friday and the like, but they have a nice selection year round.
If you can nurse another chair until another sale season they'll blow your socks off. But they'll still have quality choices at a bit more expense any old day.
I have an old school leather and mahogany roll-around chair, and even then some of their Black Friday deals have me stroking my chin and day dreaming, just when mine gets a little creaky and cranky.
The only reason I wouldn't buy an Office Max chair is if I found a deal on a Herman Miller.