Ask HN: What is your work chair/desk?

I've learned that investing in a good work chair is worth it after all, but is no surprise. Using anything less just exhausts the mind and body and limits how much work you can get done. Picking the right desk is also a factor, so feel free to comment on what your work desk is as well.

I'm curious what everyone's work chair/desk is that agrees with me on is? Personally I'm shopping around, but perhaps comments should have:

1. Price.

2. Model/Make.

3. Features.

4. Brief conclusion summarizing value.

Thanks in advance for any commentary, picking the right chair is surprising hard!