So my ~$300 Office Works chair has died after about 5 years. Cushions are flat and it's all rattly and squeaky and so on. And most importantly uncomfortable.
So I'm looking at just going all out and buying a Herman Miller Embody.
www.hermanmiller.com/products/seating/office-chairs/embody-chairs/...for ~$1800.

Now, I reckon I will sit 24 hours per week in it, 50 weeks a year, for 15 years. That is, rather coincidentally, 18,000 hours.
= 10c/hour
Before any tax deductions.
Yay? Nay? Why? Why not?
Also: Does anyone own one? How's it? It reviews as awesome (i've been researching about six months).