Odroid at hardkernal, I like the XU4 that at $53 will run full Linux distros and has A15 and A7 CPUs at 2 GHz, 2GB DDR3, Mali T-628 GPU, USB 3.0 and Gb Ethernet.
Hard to believe you get all that for $53, you wouldn't have to go back that many years to be in a place where you would have been happy to pay $2k for something like that.
While there check out their odroid go for 80 bucks, it's a ready to go gaming platform similar to Nintendo switch.
I have no affiliation with Odroid whatsoever, I just like their products.