A quick follow-up for others wanting to buy the Quickfire TK:
The keyboard won't work with my main pc, which has an older mobo (Asus M2N-MX). It does work on my laptop and another pc, so the keyboard is fine. I've ordered upgrade parts for my main system (it was due for an upgrade anyway), but this is something to be aware of if you have an older mobo and are planning to purchase this.
Some more details for those interested:
I fiddled with the BIOS settings, and occasionally the keyboard would work in the BIOS itself, and it worked in Windows exactly one time, but I could not get it to work consistently. Other threads on the web regarding this and other Quickfire models discuss similar problems. Suggested causes include: outdated BIOS versions (try updating your BIOS), USB power issues (USB controller cutting the keyboard off due to excessive power consumption), the NKRO setting in Windows.