I switched to a standing desk a year ago and love it. I didn't want to invest too much into it at first, since I didn't know if I'd like it, so I got the Fredrik desk from IKEA (~$149).
I'm just over 6' tall and it work perfectly for me. The only detraction is that you cannot adjust the height after you build the desk (unless you take it apart again).
http://www.ikea.com/us/en/catalog/products/60141484
I'm just over 6' tall and it work perfectly for me. The only detraction is that you cannot adjust the height after you build the desk (unless you take it apart again).