I have a chair on a table where the sit part of the chair + laptop is exactly the right height for my arms. And I have been doing this for about 2.5 years now. Even wrote a book about it (which I never finished :) I'll revisit it I guess.
If I get you right, you use your chair as a desk. That chair is sitting on a normal desk, so combined the height is appropriate for working while standing. Right?
I have a MBP; I rest my wrists on the huge slabs under the keyboard which works absolutely fine. If you computer doesn't have that, then yes, I would make a real table on the table so I can rest my wrists.