I am predominately Cubieboards. So far Cubie2 and Cubietruck.
I have one Linksprite_pcDuino3_Nano that I got to learn about arduino, but never did much with it. It was on sale for $10 at the time…
I am looking at the Cubieboard5, but its sata is not native, but has USB under the covers. I would love to find an affordable 4 core with native sata. My experience with my mail server on my Cubietruck is that 2 core bogs down with anti-virus checking. With 4 core, I could have one dedicated to postfix, perhaps. Of course my mailserver is an old RSEL6 setup and that may have something to do with performance.
I have looked a little at armv8 boards. Getting to 64 bit would be nice, but. I am looking for: affordable, 5V, 4 core, native sata. Been a while since I last checked what is on the market.
Having at least a few different types of boards may help here.