I ended up sucking it up and getting something with NO arms, on the grounds that my guitar comfort is more than my desk work comfort in that situation. I'm never working at the desk for long, since really the tech is just there for music purposes.
The way I see it, the less comfortable I am working at the desk, the more I'll play/practice.
Got a Roc-N-Soc throne.
Thanks to all for your input!
Mark