Excellent and super interesting collection! I have the NeXT keyboard, and I used it as my daily driver on my Mac for a while. It has a regular ADB port, so depending on the vintage of your Mac, you can use it directly or with an iMate USB adapter. Once you get used to the convenience of the Command bar, it's really hard to go back to regular ⌘ keys. Weird how this didn't catch on. The lack of function keys is a big minus, though.

And I always wanted an Avid keyboard just because it looks cool (the Extended Keyboard II version, though), but they were always rare and/or expensive.