How do you know the USB key is safe? I'd gladly blind-trust binaries on the Armory page than any USB key. I've had USB keys being used in a countless amount of computers and caught quite a few viruses (fortunately none contaminated any of my machines. So far). There are also keys rumored to be tampered with from their factories and hardware exploits...

I think some questions you've been making on this subforum and the fact you don't trust no one at whatever cost are a good thing, but I had to question this, since you seem to care a lot about security (I do too. But maybe not as much as you, or not as much as I should )