Bitcoin-Qt is the "official" client. I currently use that, but it has some limitations.
Armory has a lot of great features.
Would you recommend it? Is it as trustworthy as Bitcoin-Qt? Is it as well "peer-reviewed" as Bitcoin-Qt?
Do you have estimates on roughly how many people across the globe review the Bitcoin-Qt source code, and how many the Armory source code, before each release?
For example, if tens of thousands of people review Bitcoin-Qt, but only a dozen people review Armory, there may be a reason to worry about fraudulent activities in Armory development.
I think armory received a generous funding from venturers to better improve the client. I don't think it's in their interest to turn it to a malware