One afternoon at Ikea and 40 bucks will buy you a nice standing desk. I know it's become a cliche, but if you really do sit 80 hours a week, it may be worth the initial inconvenience.
If you're interested I'll send you links to the components on Ikea
I own a geek desk actually (it raises to standing or sitting) , but I still spend too much time in my chair. :)
I'm not the OP, but do you mind sharing the components list?