I have a Neo2 seedbox. It runs great. Rock solid. Pulls 900mb/second over gbe. Barely hits 5% cpu running dozens of torrents, over a VPN it handles, saving everything over NFS. Size of a damn oreo. The OLED kit is great. Easy library and you can write text or 1bpp images to it. Refresh rate 0.3Hz is a bit annoying but it looks cool as hell. Nice undocumented feature: the microusb and full-size usb ports have the +5v and ground wires bridged, so you can power it from an A-A cable. I like this because the A cable is the same side as the ethernet and looks cleaner. [1]
Haven't used the Neo2 yet. But its predecessor, Nano Pi Neo is $10, has excellent Armbian support, and is on par with a RPi3.
[1] http://www.friendlyarm.com/index.php?route=product/product&p...