From personal experience, I would NOT go with a Fiire 1".
I have one. It locks up SOLID regularly, can't use MythTV on it..
I wish I knew about the myth problem before I bought them (I bought a 1" and a 2.2")
They run Debian, not Kubuntu. (That's how they get the UI/2 working, which really, only half works)
The Menus are SOLID, (on an NVidia setup, their faded)
My thoughts, not yours...
The 2.2" doesn't lock up near as much, but already, it's got a bad fan, and I can't get SPDIF working on it