[dasboot]

I agree, they are expensive, and I'm actually planning on adding a do-it-yourself section with solutions like the one you've referenced.

Some people pay a lot of money for fancy office chairs though (Aerons for example), and I'd always advise to go with a sit-stand desk.

Drafting chairs with a tall desk are certainly worth a try, but it can be difficult to impossible to get the same relative height sitting on the drafting chair and standing up - this can put your wrists at a very uncomfortable angle when typing for example. (I'm pretty tall, maybe that's why this hasn't worked so well for me).