[manwe150]

If you're willing to deal with being outside the range of officially supported boards (or strongly community supported), there seems to be an endless supply of options. Just for AllWinner-based devices, there's a long list at https://linux-sunxi.org/Category:Devices (which includes some from your list like BananaPi and OrangePi). Since many routers are around the sub-$100 mark, you can also check out any of the dd-wrt / openwrt / tomato / etc. devices too. And then you can also go out of scope even further and check out FPGA-based boards (such as http://store.gadgetfactory.net/papilio-pro-spartan-6-fpga-de..., or any of the many boards like it) or go up in price and get something like the NVIDIA Jetson.

(I'm not affiliated with any of those companies, I just tinker with some of their devices. There's just so many cool toys now; why couldn't they be around when I was a kid!)