So far, Banana PI M1 seem to have most of the features supported by -current
The upcomming next release will spread support to Orange Pi as well, at least to some extent.
So far Banana Is the only pi fully officially supported
It is an A20 dualcore with quite an overclock margin, as far as I tested it (runs off an 3.5" HDD PSU at the moment)
Also it offers running managed off an single LI-Po cell, contrary to other pi-s