U can try as well http://pcengines.ch
You can look at Apu1 and Apu2
I just installed zeroshell on an APU2c4 that replaced an older Alix that worked for about 5 years and is still ok. My alix board runs zeroshell as well and maxed out the cpu on a 50 megs ISP connection when downloading torrents. Same activity on APU, the cpu is 3%.
In my setup I have a msata 16 and wle200nx . Both are supoorted well zeroshell.
However at the time of writing, cpu temp sensors and leds are not supported.