Since you're asking what we all use: Fuck chairs, fuck desks. You want comfy? Get a great couch or bed. You're not at work, you're not in an office, might as well get REAL comfy. You can sit, you can lay down, the world is your oyster.
Last time I had my PC at a desk was when I was still living with my parents at 18yrs old. Ever since I moved out I never bothered with getting a proper chair or desk, because why the fuck would I want that. Start couchmaxxing today.