What computer chairs are you guys using? I currently have a Steelcase Leap that I bought second hand for cheap, and honestly despite the rave reviews this thing has all over the internet, I think it's overhyped garbage. It feels like sitting on a chunk of hard plastic. I'm 6' 2" and it does nothing to support my upper back. It has tons of adjustments, but none of them are comfortable. Everyone seems to recommend the Herman Miller Aeron, but I don't really want to spend $1k on a chair.