I'm all in to tossing $5us in the donation hat. Don't forget that Kickstarter also sticks their fingers in the pie. So I'd prefer a direct donation method, and avoid having to buy a t-shirt/cup/pen/pin/cap - but would consider a Commander X16 case badge purchase.
The keyboard, does it have PETSCII on the keycaps? It's probably too late to inquire, but why wasn't a USB model chosen and then a USB to PS/2 adapter used to connect with the X16? I'd buy such a PETSCII keyboard even if I just had it to use with Vice on an RPi.
I'm biting my tongue on the X8, if it was tweaked wouldn't it just be the Phase-3 X16e?
The Opinionated Stay-at-home Dad